tasks #6617: Only one icon to go to an artifact

+ Remove icons from artifact widget

Change-Id: I4ca783379a1b5e7ccddf8c1e411ef8dc8c906900
Merge commit 'refs/changes/48/2248/3' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #6617: Only one icon to go to an artifact
This is Tuleap 6.12.99.14

Change-Id: I23f8f8dcb6c3d312ba3d2c9585767e98dcdbb193