Fallback to empty dict...

This fixes #13838.
Merge pull request #13839 from makinacorpus/bug2

Fallback to empty dict...
Merge pull request #13846 from SmithSamuelM/sam_raet_48

Update RoadStack Manage presence behavior so uses aliveds and generates availables
Merge remote-tracking branch 'upstream/develop' into sam_raet_48