Show a user's roles in the preferences page

Dependencies

• [2] XJRJ4J7M Add user registration
• [3] JARRBLZD Bootstrapify the Hydra forms (except the project and jobset edit pages)
• [4] LSZLZHJY Allow users to edit their own settings
• [*] SZYDW2DG hydra: added some user admin

Change contents

• replacement in src/root/user.tt at line 72
  [2.6418]→[2.6418:6470](∅→∅)
  − [% IF !create && c.check_user_roles('admin') %]
  [2.6418]

  [2.6470]
  + [% IF !create %]
• replacement in src/root/user.tt at line 76
  [2.6586]→[2.6586:6641](∅→∅)
  − <select multiple name="roles" class="span3">
  [2.6586]

  [2.6641]
  + <select multiple name="roles" class="span3" [% IF !c.check_user_roles('admin') %]disabled="1"[% END %]>