Entries and resources: Listview: Fixed a description and example regarding the listviewbeforefilter of listview on 1-4 branch. And additionally, fixed the theme D using in example16.

Hi~

I think the <code>listviewbeforefilter</code> in listview entry and its example16.html have not been updated yet.
So I fixed that entry and example by following the descriptoin and sample code http://view.jquerymobile.com/master/demos/listview-autocomplete-remote/.

And, I changed theme D - <code>data-filter-theme="d"</code> - in example16 to theme A.

If there are any problems or mistakes on that PR, please let me know. 
Thanks in advance. :)