Add `TileId` to `EditorAction` or `Behavior::on_edit`

[mahlquistj]

While building a project, we wanted to be able to identify the tab(s) being edited, and found that no TileId was being supplied in the Behavior::on_edit trait method.

I've made this work in a fork, but it's not a very efficient solution when it comes to the resize_interaction methods for Grid and Linear.

If there is any other way to detect dropping, resizing, and focus please tell me :)

While i would open a PR, i wanted to open this issue first to see if this feature would actually be accepted.

I would love to make a proper solution for this as well, as the current one has breaking changes for the EditAction enum, but may need a pointer on how you would like this feature implemented, if accepted.

[enomado]

i'm interested in something similar #93