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

Switch test from 8.8.8.8:53 to "www.github.com:80"

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

No more user prompting

Convert bool settings to SettingsFact

Made QGCCorePlugin derive from QGCToolBox and expose everything through the same mechanism as everything else.

- Convert mission load/save to it
- Allow parameter load/save on mobile

Also additional major Mission usability changes

Instead us a Toolbox concept which hangs off of QGCApplication

- Delete all old map code

This allows for testing issues found on high dpi screen without needing
a high dpi screen. it does this by doubling the font sizes.

- Moved all MavManager functionality to Vehicle
- Updated all code to use Vehicle instead of MavManager
- Removed MavManager