UI: Add warning / critical QMessageBox wrappers

UI/qt-wrappers.cpp

@@ -90,6 +90,30 @@ void OBSMessageBox::information(
 	mb.exec();
 }
 
+void OBSMessageBox::warning(
+	QWidget *parent,
+	const QString &title,
+	const QString &text)
+{
+	QMessageBox mb(QMessageBox::Warning,
+		title, text, QMessageBox::Ok,
+		parent);
+	mb.setButtonText(QMessageBox::Ok, QTStr("OK"));
+	mb.exec();
+}
+
+void OBSMessageBox::critical(
+	QWidget *parent,
+	const QString &title,
+	const QString &text)
+{
+	QMessageBox mb(QMessageBox::Critical,
+		title, text, QMessageBox::Ok,
+		parent);
+	mb.setButtonText(QMessageBox::Ok, QTStr("OK"));
+	mb.exec();
+}
+
 void QTToGSWindow(WId windowId, gs_window &gswindow)
 {
 #ifdef _WIN32

UI/qt-wrappers.hpp

@@ -48,6 +48,14 @@ public:
 			QWidget *parent,
 			const QString &title,
 			const QString &text);
+	static void warning(
+		QWidget *parent,
+		const QString &title,
+		const QString &text);
+	static void critical(
+		QWidget *parent,
+		const QString &title,
+		const QString &text);
 };
 
 void OBSErrorBox(QWidget *parent, const char *msg, ...);