add new boolean settings gtk-enable-accels and gtk-enable-mnemonics which

add new boolean settings gtk-enable-accels and gtk-enable-mnemonics which

2007-02-05  Michael Natterer  <mitch@imendio.com>

	* gtk/gtksettings.c: add new boolean settings gtk-enable-accels
	and gtk-enable-mnemonics which enable/disable accelerators and
	mnemonics (bug #72375, based on a patch from Tommi Komulainen).

	* gtk/gtkwindow.c (gtk_window_activate_key)
	* gtk/gtkmenushell.c (gtk_menu_shell_key_press): don't invoke them
	if the resp. setting is FALSE.

	* gtk/gtkaccellabel.c (gtk_accel_label_refetch)
	* gtk/gtklabel.c (gtk_label_set_pattern_internal): don't display
	them if the setting is FALSE.

	* gtk/gtklabel.c: added signal connection to the screen's settings
	object and traverse all widgets on the screen when the setting
	changes. It's slightly ugly to also update GtkAccelLabels here,
	but less ugly than connecting and traversing all widgets twice.

svn path=/trunk/; revision=17262