Cleaning up old vehicle manager and getting it ready to actually provide services for a vehicle (flight management)
Added submit flight plan
Added update flight plan
Disable flight features as these don't seem to be quite working (values must be initialized and validated before submission as backend doesn't validate and the objects don't initialize their members)

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

Create a "Dead Mouse Area" control to eat mouse events underneath desired area. This is to prevent mouse events from leaking through controls underneath the area.
Replace original "NoMouseThroughRectangle" as this is more versatile.
Prevent mouse through events from leaking underneath the Fly View tool strip.

All settings wired and persistent
Cleanup non Airmap builds

Seems to work fine without out.

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

Added AirMap settings (SettingsGroup)
Added AirMap settings block to General Settings
Create macros to deal with the tedious repetitions within SettingsGroup
Removed old, hacked in setting for AirMapKey
Remove a few of the tons of build warnings

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

For whatever reason, showing the dialog through a function causes a crash in QML (undebugable--new word!)

This reverts commit 52160d80.

Internet available now has a signal

Fixed inverse logic in camera parameter retry count
Skip close timeout if not Windows