FIX: iPhone - clicking on search bar after search has finished shows all recents and not just the filtered recents.

Reference Issue #67
iPhone: Fixed implementation of recent search.  Rotation doesn't hide search recents.  Also when you click on search and have a search term in the search box it doesn't show recents until you start typing.

References #67
When clicking on a recent search term searchBarSearchButtonClicked does not get called!

Moving logic to method thats called either way (getResultsForString)
Merge pull request #357 from MIT-Mobile/3.6/news-search

Show search results only when search field is blank or when changing the search field. Fixes #368.