refactor(3p/exwm): Improve detection of focus changes r/2874

	* exwm-input.el: (exwm-input--on-buffer-list-update): Keep track
	of last selected window and buffer, update focus only when any
	of those changes.
	(exwm-input--update-focus-defer): Add commentary.
	(exwm-input--update-focus-window-buffer): Add
	variable.

Imported from https://github.com/ch11ng/exwm/pull/737

Copyright-paperwork-exempt: yes
Co-Author: Adrián Medraño Calvo <adrian@medranocalvo.com>
Change-Id: I3e53bcf45f04d0f9a88b757dffefe6de20daadfb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3561
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

0 files changed, 0 insertions, 0 deletions