Settings: Add a shortcut icon for defining hotkeys

[Taitava]

See these icons:

Click on an icon, and the hotkey settings will be opened, showing only that particular command:

I'm using a few lines of @pjeby's code from here: https://github.com/pjeby/hotkey-helper/blob/master/src/plugin.js

[Taitava]

@pjeby is it ok that I'm borrowing your code? 🙂 The borrowed code can be seen in the following commit: 6e31d42 (file CreateShellCommandField.ts).

[pjeby]

No problem at all. Go for it!

[Taitava]

Released