Merge pull request #71360 from bruvzg/progress_dialog_theme

Fix editor progress dialog theme update.

editor/editor_node.cpp

@@ -584,10 +584,11 @@ void EditorNode::_notification(int p_what) {
 		case NOTIFICATION_ENTER_TREE: {
 			Engine::get_singleton()->set_editor_hint(true);
 
-			Window *window = static_cast<Window *>(get_tree()->get_root());
+			Window *window = get_window();
 			if (window) {
 				// Handle macOS fullscreen and extend-to-title changes.
 				window->connect("titlebar_changed", callable_mp(this, &EditorNode::_titlebar_resized));
+				window->set_theme(theme);
 			}
 
 			OS::get_singleton()->set_low_processor_usage_mode_sleep_usec(int(EDITOR_GET("interface/editor/low_processor_mode_sleep_usec")));
@@ -695,6 +696,7 @@ void EditorNode::_notification(int p_what) {
 
 				theme_base->set_theme(theme);
 				gui_base->set_theme(theme);
+				get_window()->set_theme(theme);
 
 				gui_base->add_theme_style_override("panel", gui_base->get_theme_stylebox(SNAME("Background"), SNAME("EditorStyles")));
 				scene_root_parent->add_theme_style_override("panel", gui_base->get_theme_stylebox(SNAME("Content"), SNAME("EditorStyles")));