2003-08-14  Michael Natterer  <mitch@gimp.org>

	* app/widgets/gimppreview.c (gimp_preview_button_press_event):
	return early if the widget is not realized to enable destroying
	the widget from an external "button_press_event" handler which
	returns FALSE (as done in GimpContainerGridView).
	Fixes bug #119413.

	Some paranoia fixes for similar (although unseen) problems:

	* app/widgets/gimppreview.[ch]: remember if we own a grab and
	remove it in GtkWidget::unmap().

	* app/widgets/gimppreview-popup.c: destroy the popup when the
	parent widget gets unmapped.