How to change the template with filters (unanswered... etc.)

I am using 'mobil joomla' extension for mobile phones display. I have altered the file 'com_easydiscuss/classes/themes.php' so that my customised 'mobile' theme is loaded. It works fine when the site loads.

However, problem arises when teh user click on any fileter (line unanswered, resolved etc.). On clicking a filter the default theme is loaded instead of 'mobile' theme.

It appears that a js file loads theme when a filter is clicked.

Could you please guide me which file is responsible for loading theme when a filter is clicked (not on page load)?

Thanks.