Merge #11169: [GUI] Make tabs toolbar no longer have a context menu

e254830 Make tabs toolbar no longer have a context menu (Andrew Chow)

Pull request description:

  Adds a contextMenuPolicy of Qt::PreventContextMenu to prevent the tabs toolbar from showing a context menu that allows it to be hidden.

  Fixes #11168

Tree-SHA512: 8900b3c1a891ead3c9a20dc365b436fa75f97dbe0dfa7e20ee26fd9d09f3fee6eda286b0c075ed89fe1361608ecbdd87c744e37d97a3fba62493a86dedda867b

src/qt/bitcoingui.cpp

@@ -454,6 +454,7 @@ void BitcoinGUI::createToolBars()
     if(walletFrame)
     {
         QToolBar *toolbar = addToolBar(tr("Tabs toolbar"));
+        toolbar->setContextMenuPolicy(Qt::PreventContextMenu);
         toolbar->setMovable(false);
         toolbar->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
         toolbar->addAction(overviewAction);