Add "Settings Stored" message

Marlin/src/lcd/language/language_en.h

@@ -325,6 +325,7 @@ namespace Language_en {
   PROGMEM Language_Str MSG_ERR_EEPROM_CRC                  = _UxGT("Err: EEPROM CRC");
   PROGMEM Language_Str MSG_ERR_EEPROM_INDEX                = _UxGT("Err: EEPROM Index");
   PROGMEM Language_Str MSG_ERR_EEPROM_VERSION              = _UxGT("Err: EEPROM Version");
+  PROGMEM Language_Str MSG_SETTINGS_STORED                 = _UxGT("Settings Stored");
   PROGMEM Language_Str MSG_MEDIA_UPDATE                    = _UxGT("Media Update");
   PROGMEM Language_Str MSG_RESET_PRINTER                   = _UxGT("Reset Printer");
   PROGMEM Language_Str MSG_REFRESH                         = LCD_STR_REFRESH  _UxGT("Refresh");

Marlin/src/module/configuration_store.cpp

@@ -1361,6 +1361,8 @@ void MarlinSettings::postprocess() {
         store_mesh(ubl.storage_slot);
     #endif
 
+    if (!eeprom_error) LCD_MESSAGEPGM(MSG_SETTINGS_STORED);
+
     #if ENABLED(EXTENSIBLE_UI)
       ExtUI::onConfigurationStoreWritten(!eeprom_error);
     #endif