request #6601: Translate several labels in Experimental theme

 * Projects menu label
 * Browse all projects label
 * Search placeholder

Change-Id: I656ef1828674b46ccf3cdbc3e74a852bb6a1f3b6
Merge commit 'refs/changes/27/2227/3' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  request #6601: Translate several labels in Experimental theme

Change-Id: I7c6402d4833a766a1373cea0cf5c9bcff1821575
This is Tuleap 6.11.99.51

Change-Id: If040498030fbb604cc121d4ea3d83732b3bf668b