Why this change?
In 38d3208027, the position of the
`headerBelowTitle` outlet was changed causing the deselect text in the
edit sidebar catgegory/tag modals to appear inline with the title which
we do not want.
What does this change do?
This change introduces the `belowModalTitle` outlet in `DModal` which is
where the `headerBelowTitle` outlet was located before it was changed.