Added a keyword hitcount threshold for search auto-completion, so that rarely used keywords (e.g. mistakes) aren't included.


git-svn-id: http://svn.montala.net/svn/resourcespace@4309 c08608d7-6e46-0410-86ca-f2a6f1370df5
Ensured auto-completion suggested keywords are unique


git-svn-id: http://svn.montala.net/svn/resourcespace@4310 c08608d7-6e46-0410-86ca-f2a6f1370df5