Add NonDefaultQPushButton to set autoDefault of buttons to false

Source/Core/DolphinQt/QtUtils/NonDefaultQPushButton.cpp

@@ -0,0 +1,11 @@
+// Copyright 2022 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "DolphinQt/QtUtils/NonDefaultQPushButton.h"
+
+NonDefaultQPushButton::NonDefaultQPushButton(const QString& text, QWidget* parent)
+    : QPushButton(text, parent)
+{
+  this->setAutoDefault(false);
+}