Provide "reload" Button in timeline when rare error occurs after update (no connection, replacing old values)

https://git.thm.de/kim-team/tc-frontend/-/merge_requests/294/diffs#note_161679

image

reference in !294 (merged)

When "overriding" new values in the timeline, it could lead to an empty/error state. That's totally fine, but the user expects an option to "reload".

A button would be good, for example just like in the Organizer when there is an issue with the connection.

Edited by Marwin Lebensky