[TOC] No way to identify the Layer hierarchy with the use of a screenreader or any other assistive technology

[julkuh]

Issue description

Possible solutions might be WCAG Treeview Pattern or WCAG Grouped Listbox Pattern.

Validations

• [X] Read and follow our code of conduct
• [X] Read the contributing guidelines
• [X] Check that there isn't already a similar issue

[mbeckem]

PR: #340