Option to display help_text before the form input block

Hi!
Sometimes it would be preferable to show the help text before the form input, so that the user can read the help text *before* filling out the form input, instead of doing that *after*. This is useful when using text areas or multiple checkboxes and similar tall inputs.

The issue names no files or tests; start by locating where help_text and the form input block are rendered in the repository. Trace the existing field layout and determine how an option could place help text before tall inputs, then verify the result with text areas and multiple-checkbox fields.

Written by the indexing model from the issue text.