Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Got the new BAT_LOW_THR parameter.

Clicking on the sumarry titles enters the edit mode
On the tests with users, they always clicked on the
title (because it resembled a button or something) and
nothing happened. it was a bit confusing to have the
same information in two places and only one of them
being clickable.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

During tests, if the airframe was configured to be an 'X' type
we showed just 'X' on the airframe type. It's correct but a
single letter - specially an X - made users think that it was
a error code, not the airframe name. So, because of that, also
show the vehicle type - a wrong value, but elucidative for users.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

This also replaces tabs with spaces

This does the following:
- add RTCMMavlink class that streams RTCM messages via mavlink
- add GPSProvider class that opens a serial device and uses the gps driver
  submodule to get an RTCM stream
- add a GPSManager class that manages the RTCMMavlink & GPSProvider classes
- implement gps driver callback & definitions using Qt
- add the GPSManager to the QGCToolbox

To test this, uncomment the _gpsManager->setupGPS("ttyACM0"); in
QGCToolbox.cc