Merge pull request #1 from helix-toolkit/master

update from original
Add AreSortedByDistanceAscending property to the ModelsSelectedEventArgs.
Merge pull request #2 from johnsonlu/BugFix/Selection

Add AreSortedByDistanceAscending property to the ModelsSelectedEventArgs...
Merge pull request #80 from johnsonlu/master

Add AreSortedByDistanceAscending property to the ModelsSelectedEventArgs