Adds a "Manage related isses" permission to add/remove commits/issues relations manually from the changeset view (#2009).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8777 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/fixtures/roles.yml

@@ -53,6 +53,7 @@ roles_001:
     - :browse_repository
     - :manage_repository
     - :view_changesets
+    - :manage_related_issues
     - :manage_project_activities
 
   position: 1