bufferapp/ui

<!--- Provide a general summary of your changes in the Title above -->

## Description
<!--- Describe your changes in detail -->

## Motivation and Context
<!--- Why is this change required? What problem does it solve? -->
<!--- If it fixes an open issue, please link to the issue here. -->

## Screenshots (if appropriate):

## Types of changes
<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to change)

## Checklist:
<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
- [ ] My code follows the code style and guidelines of this project. <!--- Link to Standards file coming soon. -->
- [ ] My change requires a change to the documentation.
- [ ] I have updated the documentation accordingly.
- [ ] I have updated the **CHANGELOG** document.
- [ ] I have added tests to cover my changes.
- [ ] I have performed a self-review of my own code
- [ ] I have tested my changes/additions in the latest Chrome, Firefox, and Safari.
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] All new and existing tests passed.
- [ ] I have performed the accessibility audit of my UI changes according to the accessibility doc. <!--- Link to Accessibility Standards file coming soon. -->
- [ ] [Buffer Engineers] Someone from the Design team reviewed and approved my changes
- [ ] [Buffer Engineers] I have notified the BDS team of my changes in the #proj-design-system Slack channel