Text-to-speech functionality now present for all events. Exit now ends the listening thread to ensure a smooth restart

Text to speech added when a new event is detected. Volume slider for RPi speakers (with alsamixer) functionality added.

Database sync now throttled such that only 20 threads do work at once - no longer tries to do ALL threads at the same time as that was a little extreme and offered no benefit.

to work with new database sync

Vastly improved efficiency of event import from GraceDB by means of multiprocessing. Event import rate improved from ~0.2Hz to ~15Hz.

All Popups now dismiss when a new event is detected to prevent crashes when left on. Better buttons on History and DetStat screens.

New Welcome Screen with developer info space for later. Better-sized plots across the board. More color improvements.