express: Don't update window on every config change

Changing a single letter in the Network options entry boxes would
always cause the window to update ... this is silly. Defer updating
window until config is done.

src/bin/config.c

@@ -301,9 +301,5 @@ _config_load(void)
 void 
 _config_save(void)
 {
-   if (_config_domain_save(PACKAGE_NAME, _ex_cfg_edd, _ex_cfg))
-     {
-        /* update window, channels, etc */
-        _window_update();
-     }
+   _config_domain_save(PACKAGE_NAME, _ex_cfg_edd, _ex_cfg);
 }