🐛 Use setTargetHotend in menus (#22247)

Marlin/src/lcd/menu/menu.h

@@ -132,14 +132,15 @@ class MenuItem_confirm : public MenuItemBase {
 
 // The Menu Edit shadow value
 typedef union {
-  bool     state;
+  bool      state;
-  float    decimal;
+  float     decimal;
-  int8_t   int8;
+  int8_t    int8;
-  int16_t  int16;
+  int16_t   int16;
-  int32_t  int32;
+  int32_t   int32;
-  uint8_t  uint8;
+  uint8_t   uint8;
-  uint16_t uint16;
+  uint16_t  uint16;
-  uint32_t uint32;
+  uint32_t  uint32;
+  celsius_t celsius;
 } chimera_t;
 extern chimera_t editable;
 

Marlin/src/lcd/menu/menu_temperature.cpp

@@ -169,10 +169,13 @@ void menu_temperature() {
   // Nozzle [1-5]:
   //
   #if HOTENDS == 1
-    EDIT_ITEM_FAST(int3, MSG_NOZZLE, &thermalManager.temp_hotend[0].target, 0, thermalManager.hotend_max_target(0), []{ thermalManager.start_watching_hotend(0); });
+    editable.celsius = thermalManager.temp_hotend[0].target;
+    EDIT_ITEM_FAST(int3, MSG_NOZZLE, &editable.celsius, 0, thermalManager.hotend_max_target(0), []{ thermalManager.setTargetHotend(editable.celsius, 0); });
   #elif HAS_MULTI_HOTEND
-    HOTEND_LOOP()
+    HOTEND_LOOP() {
-      EDIT_ITEM_FAST_N(int3, e, MSG_NOZZLE_N, &thermalManager.temp_hotend[e].target, 0, thermalManager.hotend_max_target(e), []{ thermalManager.start_watching_hotend(MenuItemBase::itemIndex); });
+      editable.celsius = thermalManager.temp_hotend[e].target;
+      EDIT_ITEM_FAST_N(int3, e, MSG_NOZZLE_N, &editable.celsius, 0, thermalManager.hotend_max_target(e), []{ thermalManager.setTargetHotend(editable.celsius, MenuItemBase::itemIndex); });
+    }
   #endif
 
   #if ENABLED(SINGLENOZZLE_STANDBY_TEMP)