Save ProjectSettings on editor restart

editor/project_settings_editor.cpp

@@ -258,6 +258,7 @@ void ProjectSettingsEditor::_add_feature_overrides() {
 }
 
 void ProjectSettingsEditor::_editor_restart() {
+	ProjectSettings::get_singleton()->save();
 	EditorNode::get_singleton()->save_all_scenes();
 	EditorNode::get_singleton()->restart_editor();
 }