js: show correct initial disclosure widget state

Add the class "collapsed" to the html elements defined as
not shown in the local storage for the images list sidebar.

ogcp/static/js/ogcp.js

@@ -155,6 +155,8 @@ function keepImagesTreeState() {
     images_tree.each(function () {
         if (localStorage.getItem(this.id) == 'show') {
             $(this).collapse('show');
+        } else {
+            $(this).siblings('a').addClass('collapsed');
         }
     });
 }

ogcp/templates/base.html

@@ -111,7 +111,7 @@
     <!-- ChartJS -->
     <script src="{{ url_for('static', filename='AdminLTE/plugins/chart.js/Chart.min.js') }}"></script>
 
-    <script src="{{ url_for('static', filename='js/ogcp.js') }}?v=8"></script>
+    <script src="{{ url_for('static', filename='js/ogcp.js') }}?v=9"></script>
 
     <script>
         // error messages