update demo css

Author: frankpagan

demo/index.html

@@ -24,7 +24,7 @@
             filter-sort-direction="asc"
             render-selector="[template]">
             <div
-                class="background:gainsboro:hover border-bottom:1px_solid_darkgray"
+                class="border-bottom:1px_solid_darkgray"
                 template
                 object="{{object._id}}"
                 toggle="selected">