Correct bad context path when doing pattern search inside a repository
Ref PHI101. It looks like this was maybe copy/pasted by mistake in recent design refactoring.
We need to pass the full path, not the basename() of the path, to the search form.
Test Plan: Searched inside scripts/test/, found results inside scripts/test/.
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18664