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.

The right click menu will only show up when connected to an APM autopilot,
since this feature is APM only.

This will be removed once APM updates to support MAVLink
parameters properly.

APM configuration, battery and extra sensors

configuration directories

from the autopilot.

Fixed crash in QGCRemoteControlView.cc.

Fixed crash in QGCRemoteControlView.cc when a UAV is connected, but not RADIO_CONTROL packet has been received.

hotfix: fix small compilation error