qt: Prevent the main window popup menu

By default, a popup menu contains checkable entries for the toolbars
and dock widgets present in the main window. This allows users to
accidentally hide the toolbar.

Author: hebasto

src/qt/bitcoingui.cpp

@@ -88,6 +88,8 @@ BitcoinGUI::BitcoinGUI(interfaces::Node& node, const PlatformStyle *_platformSty
         move(QGuiApplication::primaryScreen()->availableGeometry().center() - frameGeometry().center());
     }
 
+    setContextMenuPolicy(Qt::PreventContextMenu);
+
 #ifdef ENABLE_WALLET
     enableWallet = WalletModel::isWalletEnabled();
 #endif // ENABLE_WALLET
@@ -544,7 +546,6 @@ void BitcoinGUI::createToolBars()
     {
         QToolBar *toolbar = addToolBar(tr("Tabs toolbar"));
         appToolBar = toolbar;
-        toolbar->setContextMenuPolicy(Qt::PreventContextMenu);
         toolbar->setMovable(false);
         toolbar->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
         toolbar->addAction(overviewAction);