Smart RTL support

Revert the camera names to their original names to avoid messing up old plan files, which use the camera name string to match the camera to the plan.

Remove the concept of reserved buttons for manual control

Add gotoFlightMode method

Only version check stable builds

FirmwarePlugin: Issue a warning upon connecting if the firmware in use is not using a stable release

Add Sentera cameras

The LinkIndicator shows the connected links and lets the user select the priority link,

Remove/comment off debug output pollution

Firmwareplugin: Trim retry period to something that matches closer the users attention and is still long enough to allow for multiple heartbeats to pass through