Show subtools with right or control click

[ollimeier]

Fixes #1953

I first had the following code

        window.addEventListener("mousedown", globalListener, false);
        window.addEventListener("keydown", globalListener, false);

part of showSubTools to reduce duplicate code as much as possible, but I removed it again, because I believe it's more clear this way.

[justvanrossum]

Hm, this doesn't look so good: I don't think we can guarantee that the "global listener" is removed. The original code is already quite dodgy, and this adds to it.

Do you remember why we need this global listener in the first place?

[ollimeier]

Hm, this doesn't look so good: I don't think we can guarantee that the "global listener" is removed. The original code is already quite dodgy, and this adds to it.

Do you remember why we need this global listener in the first place?

We hide the subtools with the globalListener: So, if we don't focus the tools anymore, either by clicking somewhere else or if we hit the escape key.

[justvanrossum]

Superseded by #1956