fix the link of Falcon-Screen

rrd/templates/screen/base.html

@@ -37,7 +37,7 @@ function fn_query(kvs) {
     <div class="navbar-header">
         <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
         </button>
-        <a class="navbar-brand" href="/">Falcon-Screen</a>
+        <a class="navbar-brand" href="/screen">Falcon-Screen</a>
     </div>
 
     <div class="collapse navbar-collapse navbar-ex1-collapse">