Add customizable shortcuts panel

[ollimeier]

This fixes #1594, fixes #1589, fixes #721, and fixes #1642.

Known issues:

• event.preventDefault() does not work for default shortcuts like cmd+N (event.stopImmediatePropagation() does not work either)
  -> some default shortcuts cannot be overwritten, please see: bugs.chromium
  -> Good comment related to this issue

[justvanrossum]

This isn't a proper review yet, I just noticed some small things.

[justvanrossum]

Two more small things.

[justvanrossum]

I noticed that if you assign a shortcut to the ellipse tool, the tool will switch, but the icon doesn't. This is technically unrelated to this PR, but perhaps it stll makes sense to fix it here.

[ollimeier]

I noticed that if you assign a shortcut to the ellipse tool, the tool will switch, but the icon doesn't. This is technically unrelated to this PR, but perhaps it stll makes sense to fix it here.

I agree. I fixed it here already: https://github.com/googlefonts/fontra/pull/1604/files
It's related to collapseSubTools.

[justvanrossum]

I fixed it here already: https://github.com/googlefonts/fontra/pull/1604/files

Ah, but that PR got merged into a branch which is now abandoned, right?

[ollimeier]

I fixed it here already: https://github.com/googlefonts/fontra/pull/1604/files

Ah, but that PR got merged into a branch which is now abandoned, right?

yes.

[ollimeier]

We have a layout issue with long labels:

I don't think we can use the content size, as this will break alignment across sections. But:

• The label could wrap
• We could make the label column wider

(I think we should do both)

Thanks for the feedback. done.