Added support for qgcRebootRequired Fact meta data value.

Used to debug cache CRC misses.

Buggy and no longer needed

* 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.

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

Must memset structures before use.

Instead of hardcoded "QGroundContorl" strings

Use component id from heartbeat

Also removed intermediate param load retry message

_finalize methods need information which is not available if all you
have is a mavlink_message_t

Includes ability to load params

* Deal with missing parameters on Solo

* Fix trigger set

- Cache only supported on PX4. Solo sends param updates at a high rate
to update gimbal values. This was causing the cache to update itself at
too high of a rate, killing performance, especially on iOS.
- Fixed read/write index usage to provide correct progress bar updates