SOC-4456 | [Unified search] Cannot search with special characters. Fix bug.
SOC-4491: Fix spelling mistakes concerning Relationship notification plugin
SOC-4493 | Click on document in activity stream
SOC-4494 | Activities show in Activity Stream without connections
SOC-4495: [User Search] Unicode display of accent characters

Problem analysis:
* When translations are used for JavaScript variables or HTML attributes, they must be escaped.
  Abuse of escaping causes however unicode display.

Fix description:
* Remove escaping when the translations are not used for JavaScript variables or HTML attributes.
* Remove obsolete labels.
SOC-4456 | [Unified search] Cannot search with special characters
SWF-2705 : Create pdf-js branch and update projects versions
Correct version for pdfjs branch