Saturation display control and major bug fix

• We have now added the ability to control the red saturation display using "showSaturation": true (or false) in the deviceConfig file. See example files for an example.
• We have fixed the main (and possibly) only cause for software crash. This was due to a video stream temporarily disconnecting and, upon reconnection, the software was trying to use a different video backend and end up failing to connect or incorrectly connecting to a different video stream. You should now be able to fully disconnect the coax cable and reconnect it without the software crashing and the software should also be able to fully recover the connection.