Fixed
- Completion could leave some lines on the screen after being closed ([8](https://github.com/vonshednob/pter/issues/8))
- Selection boxes are using as much room as necessary to show all options
- Help screen scrolls immediately when cursor keys are used
Added
- Completion key configuration options `comp-next`, `comp-prev`, `comp-use`, and `comp-close`
- Documentation for the completion options