Join and Leave buttons seem to work, but currently both are shown on load in mobile, and need backend to update the queue viz.
still an issue with always disabling buttons during rounds. Need to disable leave queue button if the player is playing in the round. Non players should be able to join and leave the queue at will
get read timer display
queue button switches and locks/unlocks appropriately (locks while player is playing a round, unlocks after round is over)
Merge branch 'first_cut' into leave-queue
finish up queue button stuff
Single timer for round and prepare with labels
merged latest pull from first_cut