- Add toggle action per problem
- Remove global toggle action
- Add commands to show multi or single line

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