GitLab

	Qabove_handle, Qhandle, Qbelow_handle): New symbols.
	(make_lispy_event): New code to build scrollbar clicks.
	(make_lispy_movement): New code to handle scrollbar movement.
	(head_table): Include Qscrollbar_movement in the event heads.
	(syms_of_keyboard): Init and staticpro Qvertical_scrollbar,
	Qabove_handle, Qhandle, and Qbelow_handle.
	* keyboard.h (Qscrollbar_movement): Declare this along with the
	other event types.
	* lisp.h (Qvertical_scrollbar): Declare this.
	* window.c (window_from_scrollbar): New function.

	* window.c (Fset_window_configuration): Don't restore the frame's
	focus redirection if the target frame is now dead.