tasks #6619 - Use bootstrap calendar in criteria

Change-Id: I3ed58745a64d0b5fd6428f7b51b75d2c0bb318e4
Merge commit 'refs/changes/60/2260/3' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #6619 - Use bootstrap calendar in criteria
This is Tuleap 6.12.99.20

Change-Id: I37e5484727acb0c7c752bdd91151c2925be7d849