[WCAG] Shell Issues

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Current Behavior

Parent issue for sub-issues related to reviewing the shell against WCAG success criteria.

https://www.w3.org/WAI/WCAG22/quickref/?currentsidebar=%23col_customize&versions=2.1

### Expected Behavior

_No response_

### Steps To Reproduce

_No response_

### Anything else?

_No response_