Don't select the first Org tag match automatically.
Don't select the first Org tag match automatically.

This allows users to use short tags like "C", without
having the autocomplete select the first match in the list
(which could be random) as soon as a comma is entered
in the field.

Fixes issue 802.

rhyolight/nupic.son,rhyolight/nupic.son,rhyolight/nupic.son