Implement Live Video Control Interface

[erodarob]

Description: In order to have full control of the live stream during launch at Spaceport, a control panel should be developed for the main ground station window that allows the user to control the state of the live stream window. This panel should include controls for switching video feeds and remote reset of the transmitters, among others. This issue also involves the implementation of these features in the backend so that the controls are fully functional.

Tasks:

• [x] Develop a control panel in the main ground station window that is only shown in video mode
• [x] Add various controls to the control panel including:
• [x] The ability to switch both video streams to any available source, including a default "no signal" image
• [x] The ability to switch between 2 video, 1 video, and telemetry only displays
• [ ] (optional) The ability to remotely reset transmitters on the rocket
• [x] Any additional controls that could be useful
• [x] Implement systems on the backend to enable the functionality of these controls
• [x] Document the new systems

Notes:

• Remote transmitter reset is low priority as it depends on the use of two-way radio communication

[erodarob]

Added placeholder buttons for resetting transmitters, further work on this feature will be done as part of #19 or a future issue.

[erodarob]

Finished work on this issue, will be closed when #19 is closed.