fix ACTIVE state of scroll buttons (we were setting the state to ACTIVE

fix ACTIVE state of scroll buttons (we were setting the state to ACTIVE

2007-04-25  Michael Natterer  <mitch@imendio.com>

	* gtk/gtkmenu.c (gtk_menu_handle_scrolling): fix ACTIVE state of
	scroll buttons (we were setting the state to ACTIVE but
	immediately overwriting it with NORMAL or PRELIGHT). Also got rid
	of many separate calls to gdk_window_invalidate_rect() by
	remembering the old button state and only invalidating the area if
	the state has changed (addresses parts of bug #433242, Tommi
	Komulainen).

	(gtk_menu_scroll_to): change the arrow states only if changing
	from or to INSENSITIVE state, so we don't overwrite the ACTIVE
	state set by above function.

svn path=/trunk/; revision=17630