Unify historical and live playback modes
Unification of historical and live playback viewers into a single view mode, and removing the distinction between these two playback modes. E.g. pausing when in live mode will resume from the historical record, historical playback at an accelerated rate will eventually hit the present and switch to 1x playback of the live events.
These are currently implemented as two separate views, but smooth transitions between the two would be a beneficial UX feature.