Exhaustive list of changes:
- Performances improvements on huge entities lists,
- "Remember me" on login,
- Alerts on saved searches (bookmarks),
- Native browser alerts,
- Fuzzy search menu,
- Paste images in WYSIWYG editor,
- Improve knownledge base:
- add revisions,
- link with tickets and assets,
- add recursive comments
And many more, as well as a lot of bugfixes!
See changelog for detail; as well as official announcement (or the french official annoucement).