tasks #6745: Set a max width for the follow-ups (960px)

Change-Id: I5b5bf3add698b377a2669be00e4e7d4376a393aa
Merge commit 'refs/changes/38/2338/1' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #6745: Set a max width for the follow-ups (960px)

Change-Id: I0a422f8b556ad96e7f318a319dd730ce6432b782
This is Tuleap 6.12.99.78

Change-Id: Ia302604d76f62985fda982713c947b24e5fb8ebc