request #7590: Allow SVN immutable tags: GUI part

Change-Id: I9b0dceaa9c42ec36ddd29cf6d3c68e5f93d04db8
Merge commit 'refs/changes/82/3182/13' of ssh://gerrit.tuleap.net:29418/tuleap into tuleap-stable-master

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #7590: Allow SVN immutable tags: GUI part

Change-Id: I10e551132e242b8ce67f6f1aa140527df1a68fcc
This is Tuleap 7.7.99.23

Change-Id: I2a3aa114a05d07e30afa03ee046b8584783eb7a6