List to large in "Select Webform" report creation

I think the types of content are embedded webform, but not in use (have not added any field) should not appear in the list of options when creating a report.

Example:
I have attached type "webform" to type "page" I have about 100 pages so the list is too long when in fact only 4 or 5 has a "webform" being used.

On the other hand I would like to propose that instead of a selectable text field was in the writing of the title that shows you the webform that exist with that name.

This modification make filter list:

Line 22 webform_repor.inc   

<?php
- $result = db_query(db_rewrite_sql("SELECT n.nid, n.title,n.uid FROM {node} n  WHERE n.type in ($placeholders)"), $webform_types);

+ $result = db_query(db_rewrite_sql("SELECT n.nid, n.title,n.uid FROM {node} n left join {webform} w ON w.nid=n.nid  WHERE w.nid is not null and n.type in ($placeholders)"), $webform_types);
?>

I hope your opinion, Regards!