(push-mark): Don't activate the mark.

(push-mark): Don't activate the mark.
(set-mark-command): Explicitly do so here.
When popping, don't mind if mark is inactive.
(pop-mark): Deactivate mark.  Don't mind if it's inactive.
(yank-pop): Don't mind if mark is inactive.
(keyboard-quit): Deactivate the mark.
(kill-ring-save): When bouncing cursor,
bounce the mark too, so highlighted area does not change.