fix(browser/explore): on browser refresh, recognize any q param in URL a...

On browser refresh, recognize any q param in URL and put value in search bar. 

This fixes the following issue:
1. Refresh the browser when the URL has a q param (a search-box term): 
http://localhost:3000/?q=java&sort=relevance
2. Param is not recognized and search results display without q param as a search term