Context role- updating to aria 1.2 and removing PE 5

[ajanec01]

Making sure that the required context rule is ready when ARIA 1.2 becomes a recommendation.

Also, As I've been going through the examples, I've noticed that in Passed Example 5 the <div role="navigation"> is included in the accessibility tree, well, sort of. It looks like the accessibility tree is malformed by this example. The element does not have an accessible role and it is not a parent of the two list items but it is a child of the list element (see screenshot below). Technically a failure of the required owned elements rule but not a failure of ARIA. I don't think such an example should be included as a passed example.

Also, closing issue #1703

Need for Final Call: 1 week.

How to Review And Approve

• Go to the “Files changed” tab
• Here you will have the option to leave comments on different lines.
• Once the review is completed, find the “Review changes” button in the top right, select “Approve” (if you are really confident in the rule) or "Request changes" and click “Submit review”.
• Make sure to also review the proposed Final Call period. In case of disagreement, the longer period wins.