Display redacter of event.

[Half-Shot]

It's not clear at a glance who redacted an event which would be useful to make moderation more transparent to the rest of the room.

[turt2live]

Although a bug, the lack of read receipt can be used in smaller rooms: #3511

[lampholder]

I'd also like to be able to see the time of the redaction, too (I don't think this is currently available)

[uhoreg]

A fix for this should try to take into account #3929/#3657 as well (and vice versa)

[ara4n]

@turt2live's fix shows the redacter, but not the time of the redaction (which is tracked separately as #5061). closing this one - thanks!