Enhance form rendering: Radio button list

[thekaveman]

This is a follow-on to #322, to enhance how forms are rendered in the page template

@angela-tran notes:

RadioSelect in Django 3.2 renders as <li> elements. We probably don't want that? Should we add something to page.html so that we have more granular control over how radio buttons are shown? (Django docs have an example of looping over the widgets.)

The State Template form components has some example HTML for what might work here?

<!--Bootstrap4 Custom Radios-->
<div class="form-check">
    <input class="form-check-input" type="radio" name="flexRadioDefault" id="customRadio1">
    <label class="form-check-label" for="customRadio1">
        Toggle this custom radio
    </label>
</div>
<div class="form-check">
    <input class="form-check-input" type="radio" name="flexRadioDefault" id="customRadio2" checked="">
    <label class="form-check-label" for="customRadio2">
        Or toggle this other custom radio
    </label>
</div>

The comment indicates this is just Bootstrap 4 radios?

@angela-tran suggests:

Rendering the selection_label_description may involve adding some HTML to the display value in our choices tuple. My first step would be to try out the approach in https://stackoverflow.com/questions/2204696/setting-help-text-for-each-choice-in-a-radioselect.