fix closing tags

ot_templating/Resources/Private/Layouts/Modern/StructureDetails.html

@@ -23,7 +23,7 @@
                         onload="iFrameResize()"
                 ></iframe>
             </div>
-        </div>
+        </section>
 
         <f:comment><!-- Render the footer defined in partial/footer.html--></f:comment>
         <f:render partial="Modern/Footer" />

ot_templating/Resources/Private/Layouts/Modern/Structures.html

@@ -23,10 +23,9 @@
                         onload="iFrameResize()"
                 ></iframe>
             </div>
-        </div>
+        </section>
 
         <f:comment><!-- Render the footer defined in partial/footer.html--></f:comment>
         <f:render partial="Modern/Footer" />
-
     </div>
 </section>