XE-514: Refactor Dashboard to use the Activity Stream - Fixed multiple attached items message in summary for attachment events - Added descriptive time (YYYY/MM/DD HH:mm) on mouse hover (title) for events relative times - Added 'see changes' link (?viewer=changes&rev1=&rev2=) for 'update' events 
XE-514: Refactor Dashboard to use the Activity Stream
- Fixed multiple attached items message in summary for attachment events
- Added descriptive time (YYYY/MM/DD HH:mm) on mouse hover (title) for events relative times
- Added 'see changes' link (?viewer=changes&rev1=&rev2=) for 'update' events 

Implementation done by Raluca Stavro, commited without modifications

git-svn-id: cf27bad30c6b7316185bdac65b014e8c16cd40b6@32324 f329d543-caf0-0310-9063-dda96c69346f

xwiki/xwiki-enterprise,xwiki/xwiki-enterprise