Plugging in a new camera creates a duplicate ID #84

Context

Originally reported by @arturoptophys

Plugging a new camera while the GUI is running (or maybe also viewing) gives the new camera a colliding id (so there are 2 cameras with id 1)
which still works with the display (all 4 cameras are displayed) but the recording is missing one video.
Overall minor issue which is solved by restarting the GUI.

Missing information

• Is this backend specific or Basler/GenTL only?
  • Confirmed not to occur on OpenCV
• Does this persist at camera configuration time? And after device list refresh?

Potential fix

Device-specific machine IDs that disambiguate cam indices are already implemented. This may simply be a wiring issue in recording file naming, rather than a duplicate device indexing issue.