qt: Disable alt key menu navigation with style override

src/qt/qt_styleoverride.cpp

@@ -0,0 +1,14 @@
+#include "qt_styleoverride.hpp"
+
+int StyleOverride::styleHint(
+        StyleHint hint,
+        const QStyleOption *option,
+        const QWidget *widget,
+        QStyleHintReturn *returnData) const
+{
+    /* Disable using menu with alt key */
+    if (hint == QStyle::SH_MenuBar_AltKeyNavigation)
+        return 0;
+
+    return QProxyStyle::styleHint(hint, option, widget, returnData);
+}