Change Debug > Open Brackets Source to open the folder in the OS instead of
opening it in Brackets, to avoid opening a symlink path and hitting #6692.
Remove unused module (ProjectManager) 

This was causing a travis build failure
Merge pull request #9399 from adobe/pflynn/avoid-symlink-bug

Avoid "Debug > Open Brackets Source" hitting symlink bug #6692
change file view selection to working set
Merge pull request #9412 from adobe/jeff/fix-9405

change file view selection to working set
Merge branch 'release' into jeff/fix-9400