Fix preheat menu formatting

Marlin/language_en.h

 #ifndef MSG_PREHEAT_1_ALL
   #define MSG_PREHEAT_1_ALL                   MSG_PREHEAT_1 _UxGT(" All")
 #endif
+#ifndef MSG_PREHEAT_1_END
+  #define MSG_PREHEAT_1_END                   MSG_PREHEAT_1 _UxGT(" End")
+#endif
 #ifndef MSG_PREHEAT_1_BEDONLY
   #define MSG_PREHEAT_1_BEDONLY               MSG_PREHEAT_1 _UxGT(" Bed")
 #endif
 #ifndef MSG_PREHEAT_2_ALL
   #define MSG_PREHEAT_2_ALL                   MSG_PREHEAT_2 _UxGT(" All")
 #endif
+#ifndef MSG_PREHEAT_2_END
+  #define MSG_PREHEAT_2_END                   MSG_PREHEAT_2 _UxGT(" End")
+#endif
 #ifndef MSG_PREHEAT_2_BEDONLY
   #define MSG_PREHEAT_2_BEDONLY               MSG_PREHEAT_2 _UxGT(" Bed")
 #endif
 #ifndef MSG_COOLDOWN
   #define MSG_COOLDOWN                        _UxGT("Cooldown")
 #endif
-#ifndef MSG_HOTEND
-  #define MSG_HOTEND                          _UxGT("Hotend")
-#endif
 #ifndef MSG_SWITCH_PS_ON
   #define MSG_SWITCH_PS_ON                    _UxGT("Switch power on")
 #endif

Marlin/ultralcd.cpp

       #if HOTENDS == 1
         #if TEMP_SENSOR_BED != 0
           MENU_ITEM(function, MSG_PREHEAT_1, lcd_preheat_m1_e0);
-          MENU_ITEM(function, MSG_PREHEAT_1 MSG_HOTEND, lcd_preheat_m1_e0_only);
+          MENU_ITEM(function, MSG_PREHEAT_1_END, lcd_preheat_m1_e0_only);
         #else
           MENU_ITEM(function, MSG_PREHEAT_1, lcd_preheat_m1_e0_only);
         #endif
       #else
         #if TEMP_SENSOR_BED != 0
           MENU_ITEM(function, MSG_PREHEAT_1_N MSG_H1, lcd_preheat_m1_e0);
-          MENU_ITEM(function, MSG_PREHEAT_1_N MSG_HOTEND " " MSG_E1, lcd_preheat_m1_e0_only);
+          MENU_ITEM(function, MSG_PREHEAT_1_END " " MSG_E1, lcd_preheat_m1_e0_only);
           MENU_ITEM(function, MSG_PREHEAT_1_N MSG_H2, lcd_preheat_m1_e1);
-          MENU_ITEM(function, MSG_PREHEAT_1_N MSG_HOTEND " " MSG_E2, lcd_preheat_m1_e1_only);
+          MENU_ITEM(function, MSG_PREHEAT_1_END " " MSG_E2, lcd_preheat_m1_e1_only);
         #else
           MENU_ITEM(function, MSG_PREHEAT_1_N MSG_H1, lcd_preheat_m1_e0_only);
           MENU_ITEM(function, MSG_PREHEAT_1_N MSG_H2, lcd_preheat_m1_e1_only);
           MENU_ITEM(function, MSG_PREHEAT_1_N MSG_H3, lcd_preheat_m1_e2_only);
           #if TEMP_SENSOR_BED != 0
             MENU_ITEM(function, MSG_PREHEAT_1_N MSG_H3, lcd_preheat_m1_e2);
-            MENU_ITEM(function, MSG_PREHEAT_1_N MSG_HOTEND " " MSG_E3, lcd_preheat_m1_e2_only);
+            MENU_ITEM(function, MSG_PREHEAT_1_END " " MSG_E3, lcd_preheat_m1_e2_only);
           #else
             MENU_ITEM(function, MSG_PREHEAT_1_N MSG_H3, lcd_preheat_m1_e2_only);
           #endif
           #if HOTENDS > 3
             #if TEMP_SENSOR_BED != 0
               MENU_ITEM(function, MSG_PREHEAT_1_N MSG_H4, lcd_preheat_m1_e3);
-              MENU_ITEM(function, MSG_PREHEAT_1_N MSG_HOTEND " " MSG_E4, lcd_preheat_m1_e3_only);
+              MENU_ITEM(function, MSG_PREHEAT_1_END " " MSG_E4, lcd_preheat_m1_e3_only);
             #else
               MENU_ITEM(function, MSG_PREHEAT_1_N MSG_H4, lcd_preheat_m1_e3_only);
             #endif
       #if HOTENDS == 1
         #if TEMP_SENSOR_BED != 0
           MENU_ITEM(function, MSG_PREHEAT_2, lcd_preheat_m2_e0);
-          MENU_ITEM(function, MSG_PREHEAT_2 MSG_HOTEND, lcd_preheat_m2_e0_only);
+          MENU_ITEM(function, MSG_PREHEAT_2_END, lcd_preheat_m2_e0_only);
         #else
           MENU_ITEM(function, MSG_PREHEAT_2, lcd_preheat_m2_e0_only);
         #endif
       #else
         #if TEMP_SENSOR_BED != 0
           MENU_ITEM(function, MSG_PREHEAT_2_N MSG_H1, lcd_preheat_m2_e0);
-          MENU_ITEM(function, MSG_PREHEAT_2_N MSG_HOTEND " " MSG_E1, lcd_preheat_m2_e0_only);
+          MENU_ITEM(function, MSG_PREHEAT_2_END " " MSG_E1, lcd_preheat_m2_e0_only);
           MENU_ITEM(function, MSG_PREHEAT_2_N MSG_H2, lcd_preheat_m2_e1);
-          MENU_ITEM(function, MSG_PREHEAT_2_N MSG_HOTEND " " MSG_E2, lcd_preheat_m2_e1_only);
+          MENU_ITEM(function, MSG_PREHEAT_2_END " " MSG_E2, lcd_preheat_m2_e1_only);
         #else
           MENU_ITEM(function, MSG_PREHEAT_2_N MSG_H1, lcd_preheat_m2_e0_only);
           MENU_ITEM(function, MSG_PREHEAT_2_N MSG_H2, lcd_preheat_m2_e1_only);
           MENU_ITEM(function, MSG_PREHEAT_2_N MSG_H3, lcd_preheat_m2_e2_only);
           #if TEMP_SENSOR_BED != 0
             MENU_ITEM(function, MSG_PREHEAT_2_N MSG_H3, lcd_preheat_m2_e2);
-            MENU_ITEM(function, MSG_PREHEAT_2_N MSG_HOTEND " " MSG_E3, lcd_preheat_m2_e2_only);
+            MENU_ITEM(function, MSG_PREHEAT_2_END " " MSG_E3, lcd_preheat_m2_e2_only);
           #else
             MENU_ITEM(function, MSG_PREHEAT_2_N MSG_H3, lcd_preheat_m2_e2_only);
           #endif
           #if HOTENDS > 3
             #if TEMP_SENSOR_BED != 0
               MENU_ITEM(function, MSG_PREHEAT_2_N MSG_H4, lcd_preheat_m2_e3);
-              MENU_ITEM(function, MSG_PREHEAT_2_N MSG_HOTEND " " MSG_E4, lcd_preheat_m2_e3_only);
+              MENU_ITEM(function, MSG_PREHEAT_2_END " " MSG_E4, lcd_preheat_m2_e3_only);
             #else
               MENU_ITEM(function, MSG_PREHEAT_2_N MSG_H4, lcd_preheat_m2_e3_only);
             #endif