Encapsulate common display code in a singleton (#12395)

* Encapsulate common LCD code in a singleton
* Depend more UBL code on UBL_DEVEL_DEBUGGING
  - Since most users don't need the debugging on at all times, this helps reduce the default build size for UBL by over 2K, a little closer to fitting on 128K boards.

Marlin/src/feature/pause.cpp

@@ -586,7 +586,7 @@ void resume_print(const float &slow_load_length/*=0*/, const float &fast_load_le
   #endif
 
   #if ENABLED(ULTRA_LCD)
-    lcd_reset_status();
+    ui.reset_status();
   #endif
 }