Fix resetting keywords filtering

Resources/Public/JavaScript/Recommender/main.js

@@ -212,6 +212,11 @@ $(document).ready(function () {
 
         $("#filter-languages").val('');
         $("#filter-subjects").val('');
+
+        $(".form-check-input").each(function() {
+            $(this).prop('checked', false);
+        });
+
         language = false
         subject = false
     }