only set native window level, when not using a wrapped native window, see #14739

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74075 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/nonownedwnd.mm

@@ -784,7 +784,8 @@ void wxNonOwnedWindowCocoaImpl::SetExtraStyle( long exStyle )
 
 void wxNonOwnedWindowCocoaImpl::SetWindowStyleFlag( long style )
 {
-    if (m_macWindow)
+    // don't mess with native wrapped windows, they might throw an exception when their level is changed
+    if (!m_wxPeer->IsNativeWindowWrapper() && m_macWindow)
     {
         CGWindowLevel level = kCGNormalWindowLevel;