Tweak the "Auto" editor setting hints to be more indicative

This affects the editor scale and font hinting settings which will now
display their automatically chosen value in parentheses.

(cherry picked from commit 57654508c9)

editor/project_manager.cpp

@@ -2436,6 +2436,8 @@ ProjectManager::ProjectManager() {
 		switch (display_scale) {
 			case 0: {
 				// Try applying a suitable display scale automatically.
+				// The code below is adapted in `editor/editor_settings.cpp` and `editor/editor_node.cpp`.
+				// Make sure to update those when modifying the code below.
 #ifdef OSX_ENABLED
 				editor_set_scale(OS::get_singleton()->get_screen_max_scale());
 #else