Poor level of support for vertical form controls

[r12a]

This issue is applicable to languages that can be vertically set, especially Mongolian, since it has no horizontal setting.

In vertically set text, form controls should also be oriented vertically, in order to fit into the flow of the content.

More:

• lreq_doc

For more details, see this GitHub issue, which is being used to track this gap. Please add any discussion there, and not to this issue.

[r12a]

The first comment in this issue contains text that will automatically appear in one or more gap-analysis documents as a subsection with the same title as this issue. Any edits made to that comment will be immediately available in the Editor's draft of the document.

Please add any discussion to the GitHub issue being used to track this gap, and not to this issue