1999-06-03  Michael Natterer  <mitschel@cs.tu-berlin.de>

	* app/disp_callbacks.[ch]
	* app/gimpset.c
	* app/interface.c: patch from <Simon.Budig@unix-ag.org>. Cleans up
	the active image implementation. Now the button and key events of
	the whole gdisplay shell are connected to a separate active image
	callback.

	Don't let the arrow button of the gdisplay grab the focus and
	block it's events after any button_press_event, so the canvas
	always owns the keyboard focus and the button never grabs the
	pointer.

	* app/gdisplay.c: correct sensitive setting for the Layers/Stack
	submenu.

	* app/interface.c: make the query boxes insensitive after pressing
	"OK" (may be useful if they're once used for operations which take
	longer than just shrink/grow/...).

	* app/layers_dialog.c: switch to the active image when the "Auto"
	button is activated.

	* app/menus.c: bound the <Image>/Layers/Stack menu to some
	<modifier>+PageUp/Down combinations.

	* app/preferences_dialog.c: pop up with the "Interface" branch
	expanded.