Dropdown > Expandable Menu Items > Icon missing at parent level

[chris-cedrone-cengage]

Describe the bug

Initially from: #1014

-- 1.5 If you include icons on the parent level, the children do not also have icons.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://codesandbox.io/p/sandbox/dtffrn?file=%2Fexample.tsx
2. In the code, see Line 54
3. There's an error having an icon at this level

Expected behavior
At the moment, the DropdownExpandableMenuListItem as a parent doesn't allow for this prop to be used and it should be available.
If there are children to this parent with an icon, the children do not have the allowance for the same prop.

Screenshots