that it should also end joystick polling when it becomes inactive. Otherwise we
may have stray threads hangin around.

Separate startJoystick from enableJoystick. Just because the joystick is not enabled doesn't mean that we don't want to be able to monitor its behavior

* Also handles correct prioritization of high latency links

* Command ack timeout back on normal/high latency link
* Correctly update ack timeout and high latency bit at correct times

* Flight modes still not implemented. Waiting on message change.
* Also includes various cauterization of UI things which should not be
available on high latency link.

Updating localization sources

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Needed to support different indicators for advanced mode

Moved "Grid Lines" out of General Options and into the Video Stream Widget
Made a QGC custom Switch element

Nope, it's microseconds alright. The autopilot I was testing with indeed only had 19 seconds of "armed" time.

Also hand carried text to speech changes from Stable to master. Plus
unit tests for that.