Hi,
You mean to close the search area when clicking on the page?
Well, that is not part of the search plugin, it is some sort of custom script, but I might be able to suggest something.
Add this custom code to the functions.php in your theme/child theme directory (copy from line 3 only!). Before editing, please make sure to have a full site back-up just in case!
Please note that this is not related to the plugin, so it may not work correctly in every case.