Added check for no results.

The XML root node contains total_results attribute. If there are no
results matching the search term, then the user is notified of it.

Change-Id: I4b2ae5efe4af700dbc7a554a22a558f94c56e3bc
Fixed Bug: SelectPersonaDialog was not closing on clicking OK.

The dialog did not close on clicking OK if nothing was selected or if
nothing was searched. It does now.

Change-Id: I92f777bca8f306fea8da3ebd18ca41c34443a733