Roles - Define Permissions - focus areas are not totally clear

• Type: Bug
• Status: Closed
• Resolution: No Longer Reproducible
• Affects Version/s: Master
• Fix Version/s: 7.0.X, 7.1.X, 7.2.X, Master
• Component/s: Accessibility, User Management > Roles
• Labels: None
• Fix Priority: 2
• Epic Link: Accessibility Alpha 7.2 Testing

No clear highlight for non menu categories

Steps to reproduce:

1. Go to CP > Roles > Add Role > Define Permissions
2. Use keyboard to tab through left side panel and expand categories
3. Assert no highlight for last child categories
   Peek 2019-02-21 17-00.webm

Reproduced on:
FF65 + Tomcat 9.0.10 + MySQL 5.7
Portal master GIT ID: 9a50eee0582f3aa5752d12bb7374fee226930c24.