Nick Brassel 79d1db3324
Keep track of last matrix activity (#10730)
* Allow recording of the last matrix activity time, to simplify implementation of display timeouts and the like.

* Add requested changes from code review.

* Simplify split matrix last changed.
2021-01-12 19:48:24 +11:00
..
2018-07-16 22:25:02 -04:00
2018-07-16 22:25:02 -04:00