Merge branch 'thread/OP-1538_Embedded_Documentation' into next
Merge remote-tracking branch 'origin/next' into thread/OP-706_Unknown_Flightside_UAVO
OP-706 Added isKnown to UAVObject with signal on change.
OP-706 Added code to handle isKnown for requested and retrieved UAVObjects.
OP-706 Added support for isKnown for Settings objects in UAVOBrowser.
OP-706 Fixed an issue with metadata tree nodes not showing correct known statux.
OP-706 Removed debug define left in by mistake.