MacOS: Fixed an intermittent crash when closing a window from kiosk mode

modules/juce_gui_basics/native/juce_mac_NSViewComponentPeer.mm

@@ -183,14 +183,15 @@ public:
             [view removeFromSuperview];
         }
 
-        [view release];
-
         if (! isSharedWindow)
         {
             setOwner (window, nullptr);
+            [window setContentView: nil];
             [window close];
             [window release];
         }
+
+        [view release];
     }
 
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