XE-780: Improve performances of ActivityStream macro Done. Patch from Stefan Abageru applied with a minor cleanup
XE-780: Improve performances of ActivityStream macro
Done.
Patch from Stefan Abageru applied with a minor cleanup

git-svn-id: cf27bad30c6b7316185bdac65b014e8c16cd40b6@33371 f329d543-caf0-0310-9063-dda96c69346f

xwiki/xwiki-enterprise,xwiki/xwiki-enterprise