still some remaining issues with pending line items bouncing back from
data model

fix pending items indicator

still some remaining issues with pending line items bouncing back from
data model

fix pending items indicator

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.