Add support for Linux and experimenting with settings (there are "set" but no "get" options for them though)

On desktop (Ethernet connection), the ground unit pushes UDP directly, which makes the use of an actual "Link" not possible. Instead, I've moved all of Taisync support to a "manager" owned by QGCToolbox.
Added a Taisync settings with some basics already wired and running.

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

Too complicated supporting both modes as editor becomes more complex

- You can now cancel parameter change
- Tablete friendly