Multiple views with the same `HotKey` should be supported

[tig]

Today, the way HotKey support works is the first view that added the key binding gets it's Command.Hotkey command invoked and then processing stops. This means if a layout has views with _Test, only the first will get focus when the user presses Alt-T.

It would be nicer if each press of the HotKey cycled between all the views in the visible hierarchy that have bound to that hotkey.

[dodexahedron]

Agreed.

That's a more natural and typical behavior for things like that.

If they are referenced in a central place, it can be done quite easily.

Since they're delegates, you can just "add" or "subtract" to the delegate (that's also why that works on events - it's exactly the same mechanism.

Doing that then means anything that has subscribed to the delegate will automatically receive the callback, and makes things like cancellation more natural to support, as well.