DGUS updates (#17260)

Marlin/src/lcd/extui/lib/dgus/DGUSDisplay.cpp

   #error "More than 2 hotends not implemented on the Display UI design."
 #endif
 
-#include "DGUSDisplay.h"
-#include "DGUSVPVariable.h"
-#include "DGUSDisplayDef.h"
-
 #include "../../ui_api.h"
 
 #include "../../../../MarlinCore.h"
   #include "../../../../feature/powerloss.h"
 #endif
 
+#include "DGUSDisplay.h"
+#include "DGUSVPVariable.h"
+#include "DGUSDisplayDef.h"
+
 // Preamble... 2 Bytes, usually 0x5A 0xA5, but configurable
 constexpr uint8_t DGUS_HEADER1 = 0x5A;
 constexpr uint8_t DGUS_HEADER2 = 0xA5;
 void DGUSScreenVariableHandler::HandleProbeOffsetZChanged(DGUS_VP_Variable &var, void *val_ptr) {
   DEBUG_ECHOLNPGM("HandleProbeOffsetZChanged");
 
-  const float offset = float(swap16(*(uint16_t*)val_ptr)) / 100.0f;
+  const float offset = float(int16_t(swap16(*(uint16_t*)val_ptr))) / 100.0f;
   ExtUI::setZOffset_mm(offset);
   ScreenHandler.skipVP = var.VP; // don't overwrite value the next update time as the display might autoincrement in parallel
   return;

Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.cpp

   0x0000
 };
 
+const uint16_t VPList_Z_Offset[] PROGMEM = {
+  #if HOTENDS >= 1
+    VP_SD_Print_ProbeOffsetZ,
+  #endif
+  0x0000
+};
+
 const struct VPMapping VPMap[] PROGMEM = {
   { DGUSLCD_SCREEN_BOOT, VPList_Boot },
   { DGUSLCD_SCREEN_MAIN, VPList_Main },
   { DGUSLCD_SCREEN_STATUS2, VPList_Status2 },
   { DGUSLCD_SCREEN_PREHEAT, VPList_Preheat },
   { DGUSLCD_SCREEN_MANUALMOVE, VPList_ManualMove },
+  { DGUSLCD_SCREEN_Z_OFFSET, VPList_Z_Offset },
   { DGUSLCD_SCREEN_MANUALEXTRUDE, VPList_ManualExtrude },
   { DGUSLCD_SCREEN_FILAMENT_HEATING, VPList_Filament_heating },
   { DGUSLCD_SCREEN_FILAMENT_LOADING, VPList_Filament_load_unload },
   #if HOTENDS >= 1
     VPHELPER(VP_T_E0_Is, &thermalManager.temp_hotend[0].celsius, nullptr, DGUSScreenVariableHandler::DGUSLCD_SendFloatAsLongValueToDisplay<0>),
     VPHELPER(VP_T_E0_Set, &thermalManager.temp_hotend[0].target, DGUSScreenVariableHandler::HandleTemperatureChanged, &DGUSScreenVariableHandler::DGUSLCD_SendWordValueToDisplay),
-    VPHELPER(VP_Flowrate_E0, nullptr, DGUSScreenVariableHandler::HandleFlowRateChanged, &DGUSScreenVariableHandler::DGUSLCD_SendWordValueToDisplay),
+    VPHELPER(VP_Flowrate_E0, &planner.flow_percentage[ExtUI::extruder_t::E0], DGUSScreenVariableHandler::HandleFlowRateChanged, &DGUSScreenVariableHandler::DGUSLCD_SendWordValueToDisplay),
     VPHELPER(VP_EPos, &destination.e, nullptr, DGUSScreenVariableHandler::DGUSLCD_SendFloatAsLongValueToDisplay<2>),
     VPHELPER(VP_MOVE_E0, nullptr, &DGUSScreenVariableHandler::HandleManualExtrude, nullptr),
     VPHELPER(VP_E0_CONTROL, &thermalManager.temp_hotend[0].target, &DGUSScreenVariableHandler::HandleHeaterControl, nullptr),

Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.h

   DGUSLCD_SCREEN_FILAMENT_LOADING     =  76,
   DGUSLCD_SCREEN_FILAMENT_UNLOADING   =  82,
   DGUSLCD_SCREEN_MANUALEXTRUDE        =  84,
+  DGUSLCD_SCREEN_Z_OFFSET             =  88,
   DGUSLCD_SCREEN_SDFILELIST           =   3,
   DGUSLCD_SCREEN_SDPRINTMANIPULATION  =   7,
   DGUSLCD_SCREEN_SDPRINTTUNE          =   9,