Close all Strategy Tester Charts at once

I found a solution for the many charts that the strategy tester opens automatically in MT5.  Till now I closed them one by one with Ctrl F4 and than clicking on the next chart tab. 
But this goes faster:
On your keyboard:  Alt W ... this opens the Windows List.  Now select the first of the charts you want to delete and than by holding the shift key select the last.  Than click CLOSE with your mouse in that dialog box and hoppa .... all Charts are closed at once !
This was very useful. Thanks a lot for sharing.