NEW: Record at the same time in Character mode

Until now everyone took turns: the host moved from line to line and
whoever owned the role spoke while the others watched. You can now all
record at once instead. Everybody walks through their own lines at their
own pace, so a round takes a fraction of the time.

You will find it in the lobby under ORDER, right next to the recording
time. It only shows up in Character mode and is set to "All at once" by
default. Pick "One after another" if you prefer the old way.

Also in this update:

- The host can end the recording from the waiting screen, so a round no
longer stalls when someone does not finish.
- Everyone can now step back to an earlier line, not just the host.