axis_known_position -> axis_homed

In all these cases we want the axis to be homed. If we could have lost
some steps is secondary.

Reenables homing seperate axis with DISABLE_X / DISABLE_Y true.

Marlin/Marlin_main.cpp

       float zpos = current_position[Z_AXIS], z_dest = Z_RAISE_BEFORE_PROBING;
       // The zprobe_zoffset is negative any switch below the nozzle, so
       // multiply by Z_HOME_DIR (-1) to move enough away from bed for the probe
-      z_dest += axis_known_position[Z_AXIS] ? zprobe_zoffset * Z_HOME_DIR : zpos;
+      z_dest += axis_homed[Z_AXIS] ? zprobe_zoffset * Z_HOME_DIR : zpos;
       if (zpos < z_dest) do_blocking_move_to_z(z_dest); // also updates current_position
     }
 
 
 #endif // AUTO_BED_LEVELING_FEATURE
 
-static void unknown_position_error() {
-  LCD_MESSAGEPGM(MSG_POSITION_UNKNOWN);
+static void axis_unhomed_error() {
+  LCD_MESSAGEPGM(MSG_YX_UNHOMED);
   SERIAL_ECHO_START;
-  SERIAL_ECHOLNPGM(MSG_POSITION_UNKNOWN);
+  SERIAL_ECHOLNPGM(MSG_YX_UNHOMED);
 }
 
 #if ENABLED(Z_PROBE_SLED)
 
     if (z_probe_is_active == dock) return;
 
-    if (!axis_known_position[X_AXIS] || !axis_known_position[Y_AXIS]) {
-      unknown_position_error();
+    if (!axis_homed[X_AXIS] || !axis_homed[Y_AXIS]) {
+      axis_unhomed_error();
       return;
     }
 
           else if (homeZ) { // Don't need to Home Z twice
 
             // Let's see if X and Y are homed
-            if (axis_known_position[X_AXIS] && axis_known_position[Y_AXIS]) {
+            if (axis_homed[X_AXIS] && axis_homed[Y_AXIS]) {
 
               // Make sure the Z probe is within the physical limits
               // NOTE: This doesn't necessarily ensure the Z probe is also within the bed!
               }
             }
             else {
-              unknown_position_error();
+              axis_unhomed_error();
             }
 
           } // !home_all_axes && homeZ
     #endif
 
     // Don't allow auto-leveling without homing first
-    if (!axis_known_position[X_AXIS] || !axis_known_position[Y_AXIS]) {
-      unknown_position_error();
+    if (!axis_homed[X_AXIS] || !axis_homed[Y_AXIS]) {
+      axis_unhomed_error();
       return;
     }
 
    */
   inline void gcode_M48() {
 
-    if (!axis_known_position[X_AXIS] || !axis_known_position[Y_AXIS] || !axis_known_position[Z_AXIS]) {
-      unknown_position_error();
+    if (!axis_homed[X_AXIS] || !axis_homed[Y_AXIS] || !axis_homed[Z_AXIS]) {
+      axis_unhomed_error();
       return;
     }
 
   memcpy(new_pos, current_position, sizeof(new_pos));
   memcpy(new_offs, home_offset, sizeof(new_offs));
   for (int8_t i = X_AXIS; i <= Z_AXIS; i++) {
-    if (axis_known_position[i]) {
+    if (axis_homed[i]) {
       float base = (new_pos[i] > (min_pos[i] + max_pos[i]) / 2) ? base_home_pos(i) : 0,
             diff = new_pos[i] - base;
       if (diff > -20 && diff < 20) {

Marlin/language_an.h

 #define MSG_INIT_SDCARD                     "Encetan. tarcheta"
 #define MSG_CNG_SDCARD                      "Cambiar tarcheta"
 #define MSG_ZPROBE_OUT                      "Z probe out. bed"
-#define MSG_POSITION_UNKNOWN                "Home X/Y before Z"
+#define MSG_YX_UNHOMED                      "Home X/Y before Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z Offset"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_bg.h

 #define MSG_INIT_SDCARD                     "Иниц. SD-Карта"
 #define MSG_CNG_SDCARD                      "Смяна SD-Карта"
 #define MSG_ZPROBE_OUT                      "Z-сондата е извадена"
-#define MSG_POSITION_UNKNOWN                "Задайте X/Y преди Z"
+#define MSG_YX_UNHOMED                      "Задайте X/Y преди Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z Отстояние"
 #define MSG_BABYSTEP_X                      "Министъпка X"
 #define MSG_BABYSTEP_Y                      "Министъпка Y"

Marlin/language_ca.h

 #define MSG_INIT_SDCARD                     "Iniciant SD"
 #define MSG_CNG_SDCARD                      "Canviar SD"
 #define MSG_ZPROBE_OUT                      "Z probe out. bed"
-#define MSG_POSITION_UNKNOWN                "Home X/Y abans Z"
+#define MSG_YX_UNHOMED                      "Home X/Y abans Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z Offset"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_cn.h

 #define MSG_INIT_SDCARD                     "Init. SD card"
 #define MSG_CNG_SDCARD                      "Change SD card"
 #define MSG_ZPROBE_OUT                      "Z probe out. bed"
-#define MSG_POSITION_UNKNOWN                "Home X/Y before Z"
+#define MSG_YX_UNHOMED                      "Home X/Y before Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z Offset"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_cz.h

 #define MSG_INIT_SDCARD                     "Nacist SD kartu"
 #define MSG_CNG_SDCARD                      "Vymenit SD kartu"
 #define MSG_ZPROBE_OUT                      "Sonda Z mimo podl"
-#define MSG_POSITION_UNKNOWN                "Domu X/Y pred Z"
+#define MSG_YX_UNHOMED                      "Domu X/Y pred Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z ofset"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_da.h

 #define MSG_FILAMENTCHANGE                  "Skift filament"
 #define MSG_INIT_SDCARD                     "Init. SD card"
 #define MSG_CNG_SDCARD                      "Skift SD kort"
-#define MSG_POSITION_UNKNOWN                "Home X/Y før Z"
+#define MSG_YX_UNHOMED                      "Home X/Y før Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z Offset"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_de.h

 #define MSG_INIT_SDCARD                     "SDKarte erkennen"// Manually initialize the SD-card via user interface
 #define MSG_CNG_SDCARD                      "SDKarte erkennen"// SD-card changed by user. For machines with no autocarddetect. Both send "M21"
 #define MSG_ZPROBE_OUT                      "Sensor ausserhalb"
-#define MSG_POSITION_UNKNOWN                "X/Y vor Z homen."
+#define MSG_YX_UNHOMED                      "X/Y vor Z homen."
 #define MSG_ZPROBE_ZOFFSET                  "Z Offset"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_en.h

 #ifndef MSG_ZPROBE_OUT
   #define MSG_ZPROBE_OUT                      "Z probe out. bed"
 #endif
-#ifndef MSG_POSITION_UNKNOWN
-  #define MSG_POSITION_UNKNOWN                "Home X/Y before Z"
+#ifndef MSG_YX_UNHOMED
+  #define MSG_YX_UNHOMED                      "Home X/Y before Z"
 #endif
 #ifndef MSG_ZPROBE_ZOFFSET
   #define MSG_ZPROBE_ZOFFSET                  "Z Offset"

Marlin/language_es.h

 #define MSG_INIT_SDCARD                     "Iniciando tarjeta"
 #define MSG_CNG_SDCARD                      "Cambiar tarjeta"
 #define MSG_ZPROBE_OUT                      "Sonda Z fuera"
-#define MSG_POSITION_UNKNOWN                "Reiniciar X/Y y Z"
+#define MSG_YX_UNHOMED                      "Reiniciar X/Y y Z"
 #define MSG_ZPROBE_ZOFFSET                  "Offset Z"
 #define MSG_BABYSTEP_X                      "Micropaso X"
 #define MSG_BABYSTEP_Y                      "Micropaso Y"

Marlin/language_eu.h

 #define MSG_INIT_SDCARD                     "Hasieratu txartela"
 #define MSG_CNG_SDCARD                      "Aldatu txartela"
 #define MSG_ZPROBE_OUT                      "Z ohe hasiera"
-#define MSG_POSITION_UNKNOWN                "Posizio ezezaguna"
+#define MSG_YX_UNHOMED                      "Posizio ezezaguna"
 #define MSG_ZPROBE_ZOFFSET                  "Z konpentsatu"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_fi.h

 #define MSG_INIT_SDCARD                     "Init. SD-Card"
 #define MSG_CNG_SDCARD                      "Change SD-Card"
 #define MSG_ZPROBE_OUT                      "Z probe out. bed"
-#define MSG_POSITION_UNKNOWN                "Home X/Y before Z"
+#define MSG_YX_UNHOMED                      "Home X/Y before Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z Offset"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_fr.h

 #define MSG_INIT_SDCARD                     "Init. la carte SD"
 #define MSG_CNG_SDCARD                      "Changer de carte"
 #define MSG_ZPROBE_OUT                      "Z sonde exte. lit"
-#define MSG_POSITION_UNKNOWN                "Rev. dans XY av.Z"
+#define MSG_YX_UNHOMED                      "Rev. dans XY av.Z"
 #define MSG_ZPROBE_ZOFFSET                  "Offset Z"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_gl.h

 #define MSG_INIT_SDCARD                     "Iniciando SD"
 #define MSG_CNG_SDCARD                      "Cambiar SD"
 #define MSG_ZPROBE_OUT                      "Sonda-Z sen cama"
-#define MSG_POSITION_UNKNOWN                "X/Y antes que Z"
+#define MSG_YX_UNHOMED                      "X/Y antes que Z"
 #define MSG_ZPROBE_ZOFFSET                  "Offset Z"
 #define MSG_BABYSTEP_X                      "Micropaso X"
 #define MSG_BABYSTEP_Y                      "Micropaso Y"

Marlin/language_it.h

 #define MSG_INIT_SDCARD                     "Iniz. SD-Card"
 #define MSG_CNG_SDCARD                      "Cambia SD-Card"
 #define MSG_ZPROBE_OUT                      "Z probe out. bed"
-#define MSG_POSITION_UNKNOWN                "Home X/Y before Z"
+#define MSG_YX_UNHOMED                      "Home X/Y before Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z Offset"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_kana.h

 #define MSG_INIT_SDCARD                     "SD\xb6\xb0\xc4\xde\xbb\xb2\xd6\xd0\xba\xd0"                    // "Init. SD card"
 #define MSG_CNG_SDCARD                      "SD\xb6\xb0\xc4\xde\xba\xb3\xb6\xdd"                            // "Change SD card"
 #define MSG_ZPROBE_OUT                      "Z\xcc\xdf\xdb\xb0\xcc\xde\x20\xcd\xde\xaf\xc4\xde\xb6\xde\xb2" // "Z probe out. bed"
-#define MSG_POSITION_UNKNOWN                "\xb9\xde\xdd\xc3\xdd\xcaXY\xb2\xc4\xde\xb3\xba\xdeZ"           // "Home X/Y before Z"
+#define MSG_YX_UNHOMED                      "\xb9\xde\xdd\xc3\xdd\xcaXY\xb2\xc4\xde\xb3\xba\xdeZ"           // "Home X/Y before Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z\xb5\xcc\xbe\xaf\xc4"                                         // "Z Offset"
 #define MSG_BABYSTEP_X                      "X\xbc\xde\xb8\x20\xcb\xde\xc4\xde\xb3"                         // "Babystep X"
 #define MSG_BABYSTEP_Y                      "Y\xbc\xde\xb8\x20\xcb\xde\xc4\xde\xb3"                         // "Babystep Y"

Marlin/language_kana_utf8.h

 #define MSG_INIT_SDCARD                     "SDカードサイヨミコミ"             // "Init. SD card"
 #define MSG_CNG_SDCARD                      "SDカードコウカン"               // "Change SD card"
 #define MSG_ZPROBE_OUT                      "Zプローブ ベッドガイ"            // "Z probe out. bed"
-#define MSG_POSITION_UNKNOWN                "ゲンテンハXYイドウゴZ"           // "Home X/Y before Z"
+#define MSG_YX_UNHOMED                      "ゲンテンハXYイドウゴZ"           // "Home X/Y before Z"
 #define MSG_ZPROBE_ZOFFSET                  "Zオフセット"                   // "Z Offset"
 #define MSG_BABYSTEP_X                      "Xジク ビドウ"                  // "Babystep X"
 #define MSG_BABYSTEP_Y                      "Yジク ビドウ"                  // "Babystep Y"

Marlin/language_nl.h

 #define MSG_INIT_SDCARD                     "Init. SD kaart"
 #define MSG_CNG_SDCARD                      "Verv. SD card"
 #define MSG_ZPROBE_OUT                      "Z probe uit. bed"
-#define MSG_POSITION_UNKNOWN                "Home X/Y voor Z"
+#define MSG_YX_UNHOMED                      "Home X/Y voor Z"
 #define MSG_ZPROBE_ZOFFSET                  "Z Offset"
 #define MSG_BABYSTEP_X                      "Babystap X"
 #define MSG_BABYSTEP_Y                      "Babystap Y"

Marlin/language_pl.h

 #define MSG_INIT_SDCARD                     "Inicjal. karty SD"
 #define MSG_CNG_SDCARD                      "Zmiana karty SD"
 #define MSG_ZPROBE_OUT                      "Sonda Z za lozem"
-#define MSG_POSITION_UNKNOWN                "Wroc w XY przed Z"
+#define MSG_YX_UNHOMED                      "Wroc w XY przed Z"
 #define MSG_ZPROBE_ZOFFSET                  "Offset Z"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_pt-br.h

 #define MSG_INIT_SDCARD                     "Iniciar SD"
 #define MSG_CNG_SDCARD                      "Trocar SD"
 #define MSG_ZPROBE_OUT                      "Son. fora da mesa"
-#define MSG_POSITION_UNKNOWN                "Pos. Desconhecida"
+#define MSG_YX_UNHOMED                      "Pos. Desconhecida"
 #define MSG_ZPROBE_ZOFFSET                  "Deslocamento no Z"
 #define MSG_BABYSTEP_X                      "Passinho X"
 #define MSG_BABYSTEP_Y                      "Passinho Y"

Marlin/language_pt-br_utf8.h

 #define MSG_INIT_SDCARD                     "Iniciar SD"
 #define MSG_CNG_SDCARD                      "Trocar SD"
 #define MSG_ZPROBE_OUT                      "Son. fora da mesa"
-#define MSG_POSITION_UNKNOWN                "Pos. Desconhecida"
+#define MSG_YX_UNHOMED                      "Pos. Desconhecida"
 #define MSG_ZPROBE_ZOFFSET                  "Deslocamento no Z"
 #define MSG_BABYSTEP_X                      "Passinho X"
 #define MSG_BABYSTEP_Y                      "Passinho Y"

Marlin/language_pt.h

 #define MSG_INIT_SDCARD                     "Inici. cartao SD"
 #define MSG_CNG_SDCARD                      "Trocar cartao SD"
 #define MSG_ZPROBE_OUT                      "Sensor fora/base"
-#define MSG_POSITION_UNKNOWN                "XY antes de Z"
+#define MSG_YX_UNHOMED                      "XY antes de Z"
 #define MSG_ZPROBE_ZOFFSET                  "Desvio Z"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_pt_utf8.h

 #define MSG_INIT_SDCARD                     "Inici. cartão SD"
 #define MSG_CNG_SDCARD                      "Trocar cartão SD"
 #define MSG_ZPROBE_OUT                      "Sensor fora/base"
-#define MSG_POSITION_UNKNOWN                "XY antes de Z"
+#define MSG_YX_UNHOMED                      "XY antes de Z"
 #define MSG_ZPROBE_ZOFFSET                  "Desvio Z"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"

Marlin/language_ru.h

 #define MSG_INIT_SDCARD                     "Иниц. карту"
 #define MSG_CNG_SDCARD                      "Сменить карту"
 #define MSG_ZPROBE_OUT                      "Z датчик вне стола"
-#define MSG_POSITION_UNKNOWN                "Паркуй X/Y перед Z"
+#define MSG_YX_UNHOMED                      "Паркуй X/Y перед Z"
 #define MSG_ZPROBE_ZOFFSET                  "Смещение Z"
 #define MSG_BABYSTEP_X                      "Babystep X"
 #define MSG_BABYSTEP_Y                      "Babystep Y"