* glom/application.cc: set_progress_message(): Set the main UI elements to
	insensitive(), because all our current uses of the progess message should
	block user input, like a modal dialog.
	* ui/operator/window_main.glade: Move the InfoBar out of the frame, because
	it should not have the border, and so we can make the frame insensitive
	without making the InfoBar insensitive.