Fix TasksController: show owners(not all user) in Assigment field in work log body.
Fix TasksController: show owners(not all user) in Assigment field in work log body.

digitalnatives/jobsworth,evinoca/clockingit,digitalnatives/jobsworth,webstream-io/jobsworth,rafaspinola/jobsworth,ari/jobsworth,ari/jobsworth,digitalnatives/jobsworth,rafaspinola/jobsworth,evinoca/clockingit,ari/jobsworth,ari/jobsworth,evinoca/clockingit,xuewenfei/jobsworth,arunagw/clockingit,xuewenfei/jobsworth,xuewenfei/jobsworth,webstream-io/jobsworth,arunagw/clockingit,rafaspinola/jobsworth,webstream-io/jobsworth,xuewenfei/jobsworth,digitalnatives/jobsworth,rafaspinola/jobsworth,arunagw/clockingit,evinoca/clockingit,webstream-io/jobsworth,digitalnatives/jobsworth