iOS: Close the keyboard on one more event. Makes it easier to get rid of it if it gets stuck.

Common/System/System.h

@@ -61,6 +61,7 @@ void System_LaunchUrl(LaunchUrlType urlType, std::string_view url);
 enum class UIEventNotification {
 	MENU_RETURN,
 	POPUP_CLOSED,
+	DIALOG_CLOSED,
 	TEXT_GOTFOCUS,
 	TEXT_LOSTFOCUS,
 };