2009-01-20  Vincent Untz  <vuntz@gnome.org>

	Only move panel with the mouse when a mouse button modifier is used
	(the same one as in metacity). Ie: you can drag the panel to move it
	when pressing Alt.
	Fix bug #309721.
	Based on patch by William Lachance <wrlach@gmail.com>

	* panel-bindings.[ch]: monitor the gconf key for the mouse button
	modifier and provide an API to access it
	(panel_binding_set_from_string): fix typo in warning
	(panel_binding_watch): don't translate warning
	(panel_bindings_mouse_modifier_set_from_string): new
	(panel_bindings_mouse_modifier_changed): new
	(panel_bindings_initialise): don't translate warning, handle the mouse
	button modifier stuff too
	(panel_bindings_set_entries): trivial update
	(panel_bindings_get_mouse_button_modifier_keymask): new
	* panel-toplevel.c: (panel_toplevel_button_press_event): look at the
	modifier mask before starting the move

svn path=/trunk/; revision=11449