Clarify "Other form elements"

[zcorpan]

Which elements are considered to be "Other form elements"?

[zcorpan]

I think this could use this definition
https://html.spec.whatwg.org/multipage/forms.html#category-label

[zcorpan]

cc @spectranaut

[scottaohara]

The form elements that are not called out explicitly in the naming section are:

• form
• label (name prohibited)
• input =date
• =month
• =week
• =time
• =datetime-local
• =range
• =color
• =checkbox
• =radio
• =file
• =hidden (cannot be named)
• select
• datalist (cannot be named)
• optgroup
• option
• progress
• meter

some of these can be labelled - but behave a bit differently than other already called out labellable inputs.
some of these cannot named by the label element.
some cannot be named at all.