2004-08-10  Michael Natterer  <mitch@gimp.org>

	* app/widgets/gimpfiledialog.[ch]
	(gimp_file_dialog_set_sensitive): new function which works on all
	widgets in the dialog except the cancel button.

	Remember if the active progress is cancelable and added two
	booleans "busy" and "canceled". Added GtkDialog::response()
	implementation which, if the dialog is busy, cancels the active
	progress and sets the dialog's "canceled" state.

	Moved the progress bar right above the action area so it is next
	to the cancel button and in the same place for both open and save
	dialogs.

	* app/gui/file-open-dialog.c
	* app/gui/file-save-dialog.c: use the new API to make image loading
	and saving cancelable again.

	* app/widgets/gimpthumbbox.c: use the same stuff to make
	thumbnailing cancelable. Increased the minimum height a bit so it
	doesn't resize when the progress bars are shown.