♻️ Adjust LCD init, contrast default, settings load

Marlin/src/lcd/menu/menu_configuration.cpp

@@ -538,7 +538,7 @@ void menu_configuration() {
   #if HAS_LCD_BRIGHTNESS
     EDIT_ITEM_FAST(uint8, MSG_BRIGHTNESS, &ui.brightness, LCD_BRIGHTNESS_MIN, LCD_BRIGHTNESS_MAX, ui.refresh_brightness, true);
   #endif
-  #if HAS_LCD_CONTRAST
+  #if HAS_LCD_CONTRAST && LCD_CONTRAST_MIN < LCD_CONTRAST_MAX
     EDIT_ITEM_FAST(uint8, MSG_CONTRAST, &ui.contrast, LCD_CONTRAST_MIN, LCD_CONTRAST_MAX, ui.refresh_contrast, true);
   #endif
   #if ENABLED(FWRETRACT)