UI-2832  long text title is not displayed correctly in Wiki Activity
UI-2788  Platform UI is not fit the width of screen if content of activities are too long - fix for ie
UI-2728: CLONE - Activity - Incorrect UI and behavior of Answer
SOC-3497 | [Relationship] Save relationship is wrong
SOC-3475 | Error in Suggestion Portlet due to [o.e.p.c.r.s.S.PeopleRestServices]
SOC-3444 | Searching spaces by SpaceServiceImpl.getAccessibleSpacesByFilter is not correct in some cases.
SOC-3475 | Error in Suggestion Portlet due to [o.e.p.c.r.s.S.PeopleRestServices] - clear map
SOC-3475 | Error in Suggestion Portlet due to [o.e.p.c.r.s.S.PeopleRestServices] - Implement suggestion cache
SOC-3475 | Error in Suggestion Portlet due to [o.e.p.c.r.s.S.PeopleRestServices] - fix UT failed
UI-2831  Wrong limit size when sharing a link with thumbnail
SOC-3507 | All words are not matched for spaces
SOC-3509 | NPE in space ActivityStorageImpl for a number of user comments
DOC-2896 Review Social API
Merge branch 'master' into feature/upgrade-xwiki-5.0.x