fix overflow scroll and cut off text

[hipstersmoothie]

Fixes #112

PR Type

Bugfix

Describe the current behavior?

Describe the new behavior?

The modal now has a dynamic height and is scrollable.

PR Checklist

• Test: run npm run test and ensure that all tests pass
• Target master branch (or an appropriate release branch if appropriate for a bug fix)
• Ensure that your contribution follows standard accessibility guidelines. Use tools like https://webhint.io/ to validate your changes.

Additional Information

[ghost]

Thanks for opening a Pull Request! The reviewers will test the PR and highlight if there is any conflict or changes required. If the PR is approved we will proceed to merge the pull request 🙌