* Setting modal dialogs in Qt backend to be 'window modal' rather than 'application modal'. This allows modal dialogs to create an additional modal dialog that can still be interacted with. 
* Setting modal dialogs in Qt backend to be 'window modal' rather than 'application modal'. This allows modal dialogs to create an additional modal dialog that can still be interacted with. 


geggo/pyface,brett-patterson/pyface,geggo/pyface,pankajp/pyface