2003-11-20  Sven Neumann  <sven@gimp.org>

	* app/config/gimpdisplayconfig.[ch]
	* app/config/gimprc-blurbs.h: added a new gimprc option
	"activate-on-focus" that allows to configure GIMP to activate an
	image when the image window receives the focus. Useful for window
	managers using click-to-focus. Defaults to TRUE on OS_WIN32.

	* app/display/gimpdisplayshell-callbacks.c
	* app/display/gimpdisplayshell.c: implemented the new behaviour.