t/broadcast.html: warning when setting start time after end time
Issue #410
new
It is possible to accidentally set the start time before the end time on the broadcast page. This is almost definitely an error, but there may be a rare case where the user wants to stream over midnight, in which case the end time would be earlier in the day than the start time. We should have a warning message presented to the user when a broadcast is saved with the start time after the end time.