Change custom Checkbox to expose an onChange Event instead of taking an onChange callback in options.
Otherwise it's impossible to reference the checkbox from inside the callback while constructing a Checkbox

- Ability to register a context scoped history navigation widget
- context to enable / disable history navigation

- Implement Context scoped history input widget
- Adopt to context scoped history input widget

This reverts commit 27256832 which turns out did not break the import of vs/nls

This reverts commit 7de696a2.

Seems to have broken loading vs/nls in at least one case in insiders

Don't use this import form in places where it is not needed. This prevents us from correctly detecting duplicate imports