qt: disable window context help buttons

src/qt/qt_styleoverride.cpp

@@ -11,4 +11,11 @@ int StyleOverride::styleHint(
         return 0;
 
     return QProxyStyle::styleHint(hint, option, widget, returnData);
+}
+
+void StyleOverride::polish(QWidget* widget)
+{
+    /* Disable title bar context help buttons globally as they are unused. */
+    if (widget->isWindow())
+        widget->setWindowFlag(Qt::WindowContextHelpButtonHint, false);
 }

src/qt/qt_styleoverride.hpp

@@ -2,6 +2,7 @@
 #define QT_STYLEOVERRIDE_HPP
 
 #include <QProxyStyle>
+#include <QWidget>
 
 class StyleOverride : public QProxyStyle
 {
@@ -11,6 +12,8 @@ public:
         const QStyleOption *option = nullptr,
         const QWidget *widget = nullptr,
         QStyleHintReturn *returnData = nullptr) const override;
+
+    void polish(QWidget* widget) override;
 };
 
 #endif