Show "FILAMENT CHANGE" during filament change

Marlin/src/feature/pause.cpp

 
     wait_for_user = true;
     #if ENABLED(HOST_PROMPT_SUPPORT)
-      host_prompt_do(PROMPT_USER_CONTINUE, PSTR("Continuous Purge Running..."), PSTR("Continue"));
+      host_prompt_do(PROMPT_USER_CONTINUE, PSTR("Filament Purge Running..."), PSTR("Continue"));
     #endif
     #if ENABLED(EXTENSIBLE_UI)
-      ExtUI::onUserConfirmRequired(PSTR("Continuous Purge Running..."));
+      ExtUI::onUserConfirmRequired(PSTR("Filament Purge Running..."));
     #endif
     for (float purge_count = purge_length; purge_count > 0 && wait_for_user; --purge_count)
       do_pause_e_move(1, ADVANCED_PAUSE_PURGE_FEEDRATE);

Marlin/src/feature/pause.h

 enum PauseMode : char {
   PAUSE_MODE_SAME,
   PAUSE_MODE_PAUSE_PRINT,
+  PAUSE_MODE_CHANGE_FILAMENT,
   PAUSE_MODE_LOAD_FILAMENT,
   PAUSE_MODE_UNLOAD_FILAMENT
 };

Marlin/src/lcd/language/language_en.h

 #ifndef MSG_DAC_EEPROM_WRITE
   #define MSG_DAC_EEPROM_WRITE                _UxGT("DAC EEPROM Write")
 #endif
+#ifndef MSG_FILAMENT_CHANGE_HEADER
+  #define MSG_FILAMENT_CHANGE_HEADER          _UxGT("FILAMENT CHANGE")
+#endif
 #ifndef MSG_FILAMENT_CHANGE_HEADER_PAUSE
   #define MSG_FILAMENT_CHANGE_HEADER_PAUSE    _UxGT("PRINT PAUSED")
 #endif
     #define MSG_FILAMENT_CHANGE_HEATING_2     _UxGT("Please wait...")
   #endif
   #ifndef MSG_FILAMENT_CHANGE_UNLOAD_1
-    #define MSG_FILAMENT_CHANGE_UNLOAD_1      _UxGT("Wait for")
-    #define MSG_FILAMENT_CHANGE_UNLOAD_2      _UxGT("filament unload")
+    #define MSG_FILAMENT_CHANGE_UNLOAD_1      _UxGT("Wait for filament")
+    #define MSG_FILAMENT_CHANGE_UNLOAD_2      _UxGT("to fully unload")
   #endif
   #ifndef MSG_FILAMENT_CHANGE_LOAD_1
-    #define MSG_FILAMENT_CHANGE_LOAD_1        _UxGT("Wait for")
-    #define MSG_FILAMENT_CHANGE_LOAD_2        _UxGT("filament load")
+    #define MSG_FILAMENT_CHANGE_LOAD_1        _UxGT("Wait for filament")
+    #define MSG_FILAMENT_CHANGE_LOAD_2        _UxGT("to load to nozzle")
   #endif
   #ifndef MSG_FILAMENT_CHANGE_PURGE_1
-    #define MSG_FILAMENT_CHANGE_PURGE_1       _UxGT("Wait for")
-    #define MSG_FILAMENT_CHANGE_PURGE_2       _UxGT("filament purge")
+    #define MSG_FILAMENT_CHANGE_PURGE_1       _UxGT("Wait for filament")
+    #define MSG_FILAMENT_CHANGE_PURGE_2       _UxGT("purge to finish")
   #endif
   #ifndef MSG_FILAMENT_CHANGE_CONT_PURGE_1
-    #define MSG_FILAMENT_CHANGE_CONT_PURGE_1  _UxGT("Click to finish")
-    #define MSG_FILAMENT_CHANGE_CONT_PURGE_2  _UxGT("filament purge")
+    #define MSG_FILAMENT_CHANGE_CONT_PURGE_1  _UxGT("Click to stop")
+    #define MSG_FILAMENT_CHANGE_CONT_PURGE_2  _UxGT("purging filament")
   #endif
   #ifndef MSG_FILAMENT_CHANGE_RESUME_1
     #define MSG_FILAMENT_CHANGE_RESUME_1      _UxGT("Wait for print")

Marlin/src/lcd/menu/menu_filament.cpp

       return PSTR("M701 T%d");
     case PAUSE_MODE_UNLOAD_FILAMENT:
       return _change_filament_temp_extruder >= 0 ? PSTR("M702 T%d") : PSTR("M702 ;%d");
+    case PAUSE_MODE_CHANGE_FILAMENT:
     case PAUSE_MODE_PAUSE_PRINT:
     default:
       return PSTR("M600 B0 T%d");
   return PSTR(MSG_FILAMENTCHANGE);
 }
 
-void _menu_temp_filament_op(const PauseMode mode, const int8_t extruder) {
+void _menu_temp_filament_op(const PauseMode inMode, const int8_t extruder) {
+  // If no print is active, just label as "filament change"
+  const PauseMode mode = (inMode != PAUSE_MODE_PAUSE_PRINT || printingIsPaused()) ? inMode : PAUSE_MODE_CHANGE_FILAMENT;
   _change_filament_temp_mode = mode;
   _change_filament_temp_extruder = extruder;
   START_MENU();
 
 static PGM_P pause_header() {
   switch (pause_mode) {
+    case PAUSE_MODE_CHANGE_FILAMENT:
+      return PSTR(MSG_FILAMENT_CHANGE_HEADER);
     case PAUSE_MODE_LOAD_FILAMENT:
       return PSTR(MSG_FILAMENT_CHANGE_HEADER_LOAD);
     case PAUSE_MODE_UNLOAD_FILAMENT:
       return PSTR(MSG_FILAMENT_CHANGE_HEADER_UNLOAD);
+    case PAUSE_MODE_PAUSE_PRINT:
     default: break;
   }
   return PSTR(MSG_FILAMENT_CHANGE_HEADER_PAUSE);