Fix request #5145: do not add user widgets for services not activated

Bonus: enable trackerv5 my artifacts

Change-Id: I7708173c0648e2820a70c8716aab8ebd65ca275b
Merge commit 'refs/changes/22/2522/2' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Fix request #5145: do not add user widgets for services not activated

Conflicts:
	plugins/tracker/include/trackerPlugin.class.php
This is Tuleap 7.1.99.30

Change-Id: Id1b991daa54db6cc60de03d8f2f189e0d2a6ed1c