[patch] [cla] Accessibility: IndirectSelection Plugin

[jbest]

We had a screen reader company review our product. They flagged the IndirectSelection? plugin with a few minor issues.

Here is what needs to change:

1. The role needs to be checkbox
2. It is not aria-pressed, it is aria-checked

The presentation role is design for elements you want to hide from a screen reader. Here is a sample form a listbox:

  <li role="checkbox"
      aria-checked="true"
      aria-label="label1”>

[Evan]

In [28134]:

Fixes #14988, thanks for the fix patch from jbest[cla]