Add NonDefaultQPushButton to set autoDefault of buttons to false

Source/Core/DolphinQt/QtUtils/NonDefaultQPushButton.h

@@ -0,0 +1,15 @@
+// Copyright 2022 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QPushButton>
+
+// A custom QPushButton that sets the autoDefault option to false
+// This makes sure random buttons are not highlighted anymore by default
+class NonDefaultQPushButton : public QPushButton
+{
+public:
+  explicit NonDefaultQPushButton(const QString& text = {}, QWidget* parent = nullptr);
+};