toggle tool windows

Hello,

what do you think about the possibility to close the tool windows
not just with ESC or SHIFTESC, but even with ALT]]>?

I.e. ALT+<i> should toggle the corresponding tool window.

I think it would be very cool if s.o. can open with e.g. ALT+6 the TODO
list window and with another strike of ALT+6 the tool window will be
closed.

Thanks in advance, Leif