request #6609: Activate "require all words" search option by default

This option was a chackbox in all old theme, excpected Tuleap theme where it was enable by default
without a checkbox. We want to have the same behaviour in the new Experimental theme

Change-Id: Ia9921c96e0f590d2354e6fbaed630d7ff634834e
Merge commit 'refs/changes/30/2230/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #6609: Activate "require all words" search option by default
This is Tuleap 6.12.99.3

Change-Id: Ie854b594bf3606fb8fddab4c7879d1b5d1fa57cd