This fixes the issue of user not being able to edit milestone
eventhough he has the milestone edit permission
http://squish.ish.com.au/tasks/20051
Test cases for a non-admin user editing milestones
with only milestone edit permission.
Merge pull request #497 from ari/viks-user-can-not-edit-milestone-even-when-permitted

This fixes the issue of user not being able to edit milestone