Edit button in Tracker read only view have the same format as other buttons

Change-Id: Ifdf58126eb997bf9c809eb452c708e80465ef6eb
Merge commit 'refs/changes/56/1656/1' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  Edit button in Tracker read only view have the same format as other buttons

Change-Id: I07114d60549396cdfa5b23ec062f7de2bd2f0df3
This is Tuleap 6.9.99.4

Change-Id: Icdcbf1d41a0f6339d1f7b7cf8aa002f4ae27e9d6