Don't allow users to subscribe to private worklists they can't see
Don't allow users to subscribe to private worklists they can't see

This fixes a bug where we didn't check if a user could see a worklist
before allowing them to subscribe to it.

Change-Id: I89978f6de253133189767ee2c95be72667b9b706

ColdrickSotK/storyboard,ColdrickSotK/storyboard,ColdrickSotK/storyboard