Fixed an issue with all windows loosing title bar as soon as one window enters fullscreen.
Fixed an issue with all windows loosing title bar as soon as one window enters fullscreen.

cparnot/INAppStoreWindow,xvtom/INAppStoreWindow,indragiek/INAppStoreWindow,sdesimone/INAppStoreWindow,xvtom/INAppStoreWindow,cparnot/INAppStoreWindow,appden/INAppStoreWindow,indragiek/INAppStoreWindow,appden/INAppStoreWindow,sdesimone/INAppStoreWindow