[NEW] Allow commenting on activities in the stream

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@47151 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Missing files

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@47152 b456876b-0849-0410-b77d-98878d47e9d5