Bug Fix (mobile): editparticipants-nofooter.html - When adding people to
an event, we erroneously gave the user the option of adding people from
another event, even when they only belonged to one event.  The condition
we used was user.circles.length > 0.  Corrected to be > 1

Feature Tweak (mobile): register.html - When registering, make the user
enter his email twice and password only once.  This is what we're going
on the web side.

GUI tweak (web): buygiftform.html - the alignment was off