Submit Search Branch: Cache typeahead results for possible following submit query

[At-Libitum]

Now that the typeahead and the submit search follow the same pattern when displaying results. The next logical step would be to cache the result from a typeahead search so that in the case this search is followed by an Enter key (or Submit click), we wouldn't need to repeat it. This will probably be easier than to add a timeout to the typeahead to wait and see if the Enter key gets pressed (or Submit click).