Supports connecting a Fact to a QSettings value

This commit introduces the APM Airframe configuration. The interface
is the same as the PX4 one, but the way we deal with the uas is a bit different

Since the APM stack doesn't provide a xml with airframe definitions a
new one was created by hand with only the values that we need, wich will
trigger a download of the parameters file from the mavlink github

Now it correctly handles the FRAME variable and it's faster
regarding the download of the parameters for each type of Frame.

Only show Airframes for ArduCopter, not for ArduRover nor ArduPlane
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Plus notify user

Was causing layout issues between mobile and desktop. Couldn’t get a
good looking layout to work on both.

Mock link shouldn’t pop setup required message

Direct connect to PX4 Flow shows up as generic

I think the assert caused boot crashes at some times