Fix request #5022 : Lock icon for document writers.

Change-Id: I852e5cf3eecfbe608278f9f920de961a2a37246e
Merge commit 'refs/changes/06/1606/1' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  Fix request #5022 : Lock icon for document writers.

Change-Id: Ifd59cc0094f924a05ea7a58d2c812d175d5b590a
This is Tuleap 6.8.99.13

Change-Id: I673c5706a1251b3e6e650016df505f2928d39ca9