Update if == NOTIFICATION_* to switch statements to match coding style

editor/plugin_config_dialog.cpp

@@ -160,6 +160,7 @@ void PluginConfigDialog::_notification(int p_what) {
 				name_edit->grab_focus();
 			}
 		} break;
+
 		case NOTIFICATION_READY: {
 			connect("confirmed", callable_mp(this, &PluginConfigDialog::_on_confirmed));
 			get_cancel_button()->connect("pressed", callable_mp(this, &PluginConfigDialog::_on_cancelled));