Merge master to stabilizatin
Merge branch 'feature/stabilization'
Merge branch 'master' into feature/stabilization
UI-3164: Convert css to less in portlet-presentation
ECMS-5916 Failure in TestTimelineService

Fix description:
* Restore the item limitation per timeline (5 items) in testGetDocumentsOfEarlierThisWeek()
* Correct the condition of counter for testGetDocumentsOfEarlierThisMonth() and testGetDocumentsOfEarlierThisMonth2() by taking into account the case where last week of a year is week 1.
Merge branch 'feature/stabilization'
Merge branch 'master' into feature/ck-editor