Folder selection dialog should consume focus when opened

This is an extension of JBDS-3696. Hitting Browse opens a folder selection dialog. At this point nothing stops me from switching back to the main window and clicking whatever UI element I want.

The trouble is that while these elements do not seem to respond when the browse dialog is shown, all the actions get queued up and execute once the dialog closes.

But wait - it gets better! I can open the dialog and then click a sequence of buttons (like 'continue', 'back' - many times) and it always lands on a different page in the end.