Accessibility -> Cannot navigate to the Left navigation menu on A&R using the "Tab" key/Keyboard

## Description
**How to replicate:**
* Navigate to the A&R test environment: [A&R Admin](https://d3ahrzu0mpndj3.cloudfront.net/)
* Try to navigate to the left navigation menu using the keyboard tab key

**Expected Behavior:**
* User should be able to access all the website components using the keyboard

**Issue:**
* cannot access the left navigation menu using the Tab key

## Linked issues
relates to
- [x] ~[BRS-822](https://bcparksdigital.atlassian.net/browse/BRS-822)~

No source file or test is named. Start by reproducing the keyboard navigation failure in the linked A&R test environment, then trace the left navigation implementation; done means the menu and its website components are reachable with the Tab key.

Written by the indexing model from the issue text.