Add icon to Filter List by Title

client/components/sidebar/sidebarFilters.jade

@@ -4,7 +4,9 @@
   and #each x in y constructors to fix this.
 
 template(name="filterSidebar")
-  h3 {{_ 'list-filter-label'}}
+  h3
+    i.fa.fa-trello
+    | {{_ 'list-filter-label'}}
   ul.sidebar-list
     form.js-list-filter
       input(type="text")