Fixed: When searching by case title, removing the text and then searching with another case no longer results in error: 

Fixed an issue happening when RPT Admins on the case page searched for cases using the case title. User would get results, but removing the case title text from the search case text field and clicking on the search button resulted in errors. After a search is made using the case title, removing the text and searching with another case no longer returns the previously searched case title. After a search made using the case title, removing the case title text on the search case text field and clicking on the search button no longer returns the previously entered case title in the search field.