jQuery .change() is deprecated

I don’t know if and how you accept contributions.
Anyway, in cstm.js.multiselect.js instead of calling

    $('#sanitize_svg_option input').change(function(){
        sanitize_svg_option_check();
    }); 

it should be

    $('#sanitize_svg_option input').on('change', function(){
        sanitize_svg_option_check();
    }); 

since the change() method is deprecated.