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/gcode/lcd/M117.cpp

@@ -28,6 +28,6 @@
  */
 void GcodeSuite::M117() {
 
-  lcd_setstatus(parser.string_arg);
+  ui.setstatus(parser.string_arg);
 
 }