Hard coded the name of the serial device in. Error message dialog pops
up if no device with the correct name is detected.
Added menu that will eventually host settings for selected cameras. Now
when selecting a camera, the name gets disabled from the open camera
menu and gets moved to the camera menu on the menu bar. Next, need to
map selecting camera from camera menu to adjustable settings.
Program allows you to select camera trigger pin via menu bar after
opening initializing the camera. Multi camera saving works. Next may add
the ability to right click a video widget and show the same setting
menu. Also should disable gpio pin already used so the user knows what
pin is already activated.