Fixed hanging notification star in tray icon.

After reading a message the notifier was not cleared.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@5004 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/gui/MainWindow.cpp

@@ -801,6 +801,9 @@ void MainWindow::updateTrayCombine()
         }
     }
     notifyMenu->menuAction()->setVisible(visible);
+
+    // update tray icon
+    updateFriends();
 }
 
 void MainWindow::updateStatus()