Update the 2.8 release notes with recent changes

Add recently merged fixes.

Restructure the "Web UI" part of the "Bug Fixes" section to list
the fixes according to UI area.  This makes the structure more
consistent with the structure of the "New Features" section.

Remove the "Updates" section which only contains "TODO".

Change-Id: I7dfaa80bba820f5ca31c400e561868d1d81a0a11
1 file changed