Remove unconnected view from QGC.
Both on the backend (replaced with DEFAULT view) and on the front end (removing UI menu items).
Merge branch 'master' of https://github.com/mavlink/qgroundcontrol into rem_unconnected

Conflicts:
	src/ui/MainWindow.cc
Merge pull request #800 from Susurrus/rem_unconnected

Remove unconnected view from QGC.