UI Dev Work for Sprint 141-1

[AdamJ]

Catch-all for PRs submitted to fabric8-ui that do not have corresponding fabric8-ux stories.

[AdamJ]

• [x] Removed hard coded prefixes
• [x] Upgrade Stylelint and posts
• [x] Fix appearance of empty scrollbar when there is nothing to scroll
• [x] Update PatternFly dependencies