tasks #7308: adapt mediawiki Tuleap skin to options

Change-Id: I1d91755be6a16054d8a23c3a9982f10342543def
Merge commit 'refs/changes/14/2814/8' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #7308: adapt mediawiki Tuleap skin to options

Change-Id: I3ab726222bb2ba42e2b74da3a98491cffa749b8f
This is Tuleap 7.3.99.39

Change-Id: I369615ad6b728d9931b0a7d0e02f3695a8c00822