QskMenu: Add own subcontrol Overlay

... so we can style it differently from the one of the QskPopup

skins/material3/QskMaterial3Skin.cpp

@@ -324,6 +324,8 @@ void Editor::setupMenu()
     setBoxBorderMetrics( Q::Panel, 0 );
     setPadding( Q::Panel, 0 );
 
+    setGradient( Q::Overlay, Qt::transparent );
+
     // The color here is primary with an opacity of 8% - we blend that
     // with the background, because we don't want the menu to have transparency:
     const auto panel = flattenedColor( m_pal.primary, m_pal.background, 0.08 );

src/controls/QskMenu.cpp

@@ -17,6 +17,7 @@
 #include <qvariant.h>
 #include <qeventloop.h>
 
+QSK_SUBCONTROL( QskMenu, Overlay )
 QSK_SUBCONTROL( QskMenu, Panel )
 QSK_SUBCONTROL( QskMenu, Segment )
 QSK_SUBCONTROL( QskMenu, Cursor )
@@ -81,6 +82,8 @@ QskMenu::QskMenu( QQuickItem* parent )
     setPopupFlag( QskPopup::CloseOnPressOutside, true );
     setPopupFlag( QskPopup::DeleteOnClose, true );
 
+    setSubcontrolProxy( Inherited::Overlay, Overlay );
+
     initSizePolicy( QskSizePolicy::Fixed, QskSizePolicy::Fixed );
 }
 

src/controls/QskMenu.h

@@ -32,7 +32,7 @@ class QSK_EXPORT QskMenu : public QskPopup
     using Inherited = QskPopup;
 
   public:
-    QSK_SUBCONTROLS( Panel, Segment, Cursor, Text, Graphic, Separator )
+    QSK_SUBCONTROLS( Overlay, Panel, Segment, Cursor, Text, Graphic, Separator )
     QSK_STATES( Selected )
 
     QskMenu( QQuickItem* parentItem = nullptr );