Privacy and Security Settings window opens twice

If the user chooses "Privacy and Security Settings" from the torbutton menu 4 times in a row, here's what happens:

1. P&S dialog opens
2. nothing happens
3. Another P&S dialog opens (now two are open simultaneously)
4. nothing happens

I think a better behavior would be:

1. Dialog opens
2. Dialog gets focus
3. Dialog gets focus
4. Dialog gets focus

If the user closes the dialog, of course choosing the menu again should result in opening the window again.