Lock attempt ID with currently timing attempt

[coder13]

So right now, when someone submits a time, it'll just send it with the latest solve ID and the server will use that ID to update that attempt for that user.

What we can do is upon priming the timer, save that solve ID, then when the user is submitting a time, send that solve ID such that if a person is still timing when someone starts a new scramble, they submit the time for the correct solve.