Additions for View navigation, including saving dockwidget locations and status. Also added remembering of "Advanced Mode" between restarts of QGC

Changes for the new "View" navigation, and fixes to get most of the dockwidgets working with the new view system

view, rather than having universal dock widgets.

This commit still allows configuration widgets to be loaded from qgc files
assuming that there is no APM generated xml file (arduplane.pdef.xml) in
the files/%autopilorname%/ directory. This filename needs to be
configurable, and selectable at runtime. It is not yet.

3DMouse working on Windows and Ubuntu

Implementation of 6DOF 3DMouse input (Windows only). Not tested yet.

Fixed some destructor commands

Cleaned up MainWindow init dramatically, relying now on Qts persistence capabilities. Fixed a number of view persistence issues this way

Added proper support for fullscreen mode, fixed issue with window state update on perspective change