Remove responsive datatables plugin - use normal media queries.

Set datatables stateSave to true as default
Remove some old images.
Change button on edit user modal

data/interfaces/default/edit_user.html

@@ -33,7 +33,7 @@ DOCUMENTATION :: END
 </div>
 <div class="modal-footer">
     <div>
-        <input type="button" id="save_user_name" class="btn btn-primary" value="Save">
+        <input type="button" id="save_user_name" class="rounded rounded-primary" value="Save">
         <span id="edit-user-status-message"></span>
     </div>
 </div>