fix

common/lib/capa/capa/templates/drag_and_drop_input.html

 <section id="inputtype_${id}" class="capa_inputtype" >
     <div class="drag_and_drop_problem" id="drag_and_drop_div_${id}"
     style="width:${width};height:${height}">
-    <p>${images_list}</p>
         % if images_list:
             <ul>
                 % for item in images_list: