Comment 16 for bug 1774777

There are several event loops running during the closing of the DIALOG_CHOOSE_COMPONENT: its own event loop which may have only been scheduled for exit rather than actually exited, and even if that is fixed there's the event loop of the progress-reporter from the FOOTPRINT_SELECT_WIDGET.

So I think Seth is on the right track with removing the dialog from its parent so that it can go ahead and die on its own.