Updates in general was only done if a POI changed. This caused changes related to something other than a change in POI to be ignore. The code now "resets" the POI when such changes occur (change of ruleset for example).
Ruleset selection is was not persistent. When reloading the list of rulesets for a given region, any previously selected ruleset would be reset to defaults.
Also fixed several new clang warnings.

* Load Plan
* Save to KML
* Load Plan (it tries to load KML instead)

Create new, specific button for clearing mission from vehicle
Adjust sizing of DropPanel

Have different modes for the Airspace Widget (Plan/Fly)

Adding missing qgcView to QGCMapPolygonVisuals instance in SurveyMapVisual.qml

Make all argument to AirMap queries based on what the screen shows (bounding rectangle and/or radius), respecting the limits imposed by AirMap.

AirspaceManager is now exposed by QGroundControlQmlGlobal instead of Vehicle (available all the time)

Fix sorting issues with QmlObjectListModel
Show airspaces in Plan View as well

Added an "unavailable" icon for when no vehicle is connected
Toggle restriction overlays (map) on/off based on the airspace widget being expanded/collapsed respectively

Handled "airspace visible" state (not done)
Adjusted restriction map items color and opacity
Added/Updated icons for airspace traffic
Adjust colors for text over maps

All settings wired and persistent
Cleanup non Airmap builds

Eliminated flight widget "states"
Define flight widget top margin (plugin options)

Adjust colors
Remove unused image

Fix #5812
Show an error message when creating a KML without 2 items at least
Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>