macosx: Correct Reset all in simple prefs

when i press "reset all" i expect all prefs to be reset and saved, instead of previous behaviour where all prefs were reset, but only the simple prefs were saved.

modules/gui/macosx/simple_prefs.m

@@ -651,8 +651,8 @@ create_toolbar_item( NSString * o_itemIdent, NSString * o_name, NSString * o_des
     if( i_return == NSAlertAlternateReturn )
     {
         config_ResetAll( p_intf );
-        b_intfSettingChanged = b_videoSettingChanged = b_audioSettingChanged = b_osdSettingChanged = b_inputSettingChanged = YES;
         [self resetControls];
+        config_SaveConfigFile( p_intf, NULL );
     }
 }