Display time of last update

I’m missing the possibility to see the time when the presently displayed information on the dashboard was last updated. I think this would be quite easy to implement - every time the pages are reloaded, the displayed time is set to the present time. Especially for screenshots or if pages didn’t refresh for a long time, this information would be relevant for knowing whether displayed statistics are up-to-date.

See: Display the time that last Archive ran "Reports were generated X seconds|minutes|hours ago" · Issue #1052 · matomo-org/matomo · GitHub