add btn-danger definition
add a button 'disconnect from gerrit'
i18n
Route disconnect_gerrit request
once de-migrated, the repo can no longer be migrated again
reset permissions after de-migration
fix copyright
adjust message
Merge remote-tracking branch 'stable/master' into 2506_remove_link_between_gerrit_and_tuleap

* stable/master:
  This is Tuleap 5.12.99.15
  This is Tuleap 5.12.99.14
  See grand-children of an artifact in its hierarchical view
  SLA : Search criterias desappear
A repository can now be disconnected from Gerrit

Change-Id: I4c238f3142d4b31483c2434d8648d1e38a474be8
Merge commit 'refs/changes/54/354/2' of http://gerrit.tuleap.net/tuleap into stable

* http://gerrit.tuleap.net/tuleap:
  A repository can now be disconnected from Gerrit
This is Tuleap 5.12.99.16
Merge branch '2506_remove_link_between_gerrit_and_tuleap' into stable

* 2506_remove_link_between_gerrit_and_tuleap:
  adjust message
  fix copyright
  reset permissions after de-migration
  once de-migrated, the repo can no longer be migrated again
  Route disconnect_gerrit request
  i18n
  add a button 'disconnect from gerrit'
  add btn-danger definition