Add missing search button

templates/index.html

@@ -51,7 +51,7 @@
                   <form class="navbar-form navbar-right" role="search" action="/search" method="get">
                       <div class="form-group">
                         {{ SearchCommon .Search }}
-                        {{ SearchAdvanced .Navigation .Search }}
+                        {{ SearchButton .Search }}
                       </div>
                   </form>
               </div>