Fix highlighting on selected hierarchy items. (#1495)

- Highlighting of selected hierarchy items was broken by commit 2e6a78ad.

themes/bootstrap3/less/components/js-tree.less

@@ -76,6 +76,16 @@
   color: #000;
 }
 
+.collection-hierarchytree {
+  .jstree-clicked {
+    color: @list-group-active-color;
+    background-color: @list-group-active-bg;
+    .jstree-icon {
+      color: #fff;
+    }
+  }
+}
+
 /* --- Facets --- */
 .facet .jstree-ocl:before {
   float: left;

themes/bootstrap3/scss/components/js-tree.scss

@@ -76,6 +76,16 @@
   color: #000;
 }
 
+.collection-hierarchytree {
+  .jstree-clicked {
+    color: $list-group-active-color;
+    background-color: $list-group-active-bg;
+    .jstree-icon {
+      color: #fff;
+    }
+  }
+}
+
 /* --- Facets --- */
 .facet .jstree-ocl:before {
   float: left;