Rooms: UI enhancements

[kpettinga]

• [x] time slot times should display west coast time, not the local time. (input values are fine, just a matter of presentation).
• [x] Ability to make another booking after a submission
• [x] show schedule for rooms from open to close. many rooms are open past midnight which is technically the following day. when requesting a availability for a certain day, slots for 12am-1am the following day do not get returned. Probably need to query 2 days at time, then use some logic to parse out what the actual open-close times are.
• [x] Add a visual indicator somewhere in the dialog box to indicate when a submission or request for availability is in progress.

See http://libraryweb.wpengine.com/meeting-and-presentation-spaces/ for a live example of the room reservation system

[davekellam]

I added the multiday booking check in f07c88fb. Right now, it's set to span the first day and day after, but could be modified to grab the whole week's bookings.

See get_space_item() and the line $date->modify( '+1 day' );. For the whole week, that can be change to 6 days, or commented out to continue receiving the current day.