Fix Windows QUpgrade on TeamCity

UAS: disabled global position forwarding

FTP progress bar and download speed

Also updated to latest QGCUASFileManager implementation.

Also restructured signals to be more command-centric as opposed to
ui-centric.

Revert "Joystick: update gui and send new mavlink target messages". That PR broke Windows compilation and had other issues that also needed to be addressed.

Fix windows install

Joystick: update gui and send new mavlink target messages

Mavlink update

And I really mean it this time!

Copy platforms plugins to install

More FTP support, plus unit tests

Added:
- sequence numbers
- better filtering for image encapsulated data messages versus FTP
- directory list now contains file sizes
- open command now returns file size in data

Run macdeployqt from same dir as qmake

Handles case where multiple versions of QT are installed on machine.

Fix various styling issues

Also added a corresponding style for the light themes to make it a little prettier (though it wasn't broken on light themes).