WIP: Search for Community using elasticsearch

First cuts for search feature for Community
When working with Sonali on design for the suggestions box, she suggested removing the "Search for" suggestion that showed up in the beginning if there were no suggestions. That meant the first thing in the list shouldn't be selected anymore. Example: If I was looking to search for string "post" and there was a thread suggestion, it'd always be selected and I couldn't search on the query string. So I modified selection list a little to allow not selecting the first value by default.