Added missing reference to MediaBrowser.Common

2nd launch of ServerApplication will call OpenDashboard

MediaBrowser.ServerApplication/App.xaml.cs

@@ -33,8 +33,8 @@ namespace MediaBrowser.ServerApplication
         #region ISingleInstanceApp Members
         public bool SignalExternalCommandLineArgs(IList<string> args)
         {
-            // handle command line arguments of second instance
-            // ...
+            OpenDashboard();
+
             return true;
         }
         #endregion
@@ -45,5 +45,9 @@ namespace MediaBrowser.ServerApplication
 
             Kernel.Instance.Dispose();
         }
+
+        public static void OpenDashboard()
+        {
+        }
     }
 }