Call onHide callback after removing PopOver layer.
Call onHide callback after removing PopOver layer.

The optional onHide callback in PopOverView is now called after it has finished
removing itself and the child view from the document, so that any cleanup
function that wants to destroy the child view can, and if it wants to redraw
something in the menu it can do so out of the document, more efficiently.

linagora/overture,Hokua/overture,adityab/overture,linagora/overture,fastmail/overture