Don't confirm hogs number to room admin when no constraint hit

Fix server crasher

Initial theme selection is now random. Theme prompt now has a search input and no longer uses FlowLayout. (Resolves issue #520)

Start work on the checker. Not it could connect to the server and... crash it.

this should not be exposed

- Collect synced packets to send within 1 second (cSendEmptyPacketTime) into buffer which is flushed each second. - Send empty packet only if there was no other synced message within last second. This should reduce traffic load: less bytes and less packets (less packets is very good for the server too).

Trying to prevent audio mute from endlessly spamming. Untested.