Be able to key out of suggestions list

[jaronbarends]

(I have added pull request #50 for this)

Scenario:

pull request in issue #46 is merged
List of suggestions is open
User navigates the list with up/down arrow keys
User reaches the first (going up) or last (going down) item the list
Now the user can not "leave" the list to be able to submit the text in the search field with [enter]

My pull request makes the active item not wrap around, but removes the active state after the first / last item is passed. (Hitting the up/down key one more time then starts a new sequence, so the order will become 1st - 2nd - 3rd - last - none - 1st - 2nd...)