Update to PR 239 fixing groupedlist syntax error. All form fields available in 5.0 documented.

[mfleeson]

[robbiejackson]

This is great!

I wrote an introductory page to the standard form fields at https://manual.joomla.org/docs/general-concepts/forms-fields/standard-form-fields, and linked back from there to where the documentation has been traditionally.

We should consider how this page fits in, now that the form field documentation is being transferred. We could do one of:

• ditch it
• move some of the text to your "list of form fields" page, and discard the rest
• leave it mostly as it is, just link to the "list of form fields" page

What do you think is best?

As it stands, the current "standard form fields" page and the new "list of form fields" page share the same sidebar position, so we should fix that. Plus links on that "standard form fields" page should be updated to refer to the joomla manual pages instead.