Nested fieldsets are not working nice as expected / Group of radio buttons

Recently I had a website project with a complex form using fieldsets as accordion wrappers for the top level fieldsets and normal fieldsets within in modular page (4 top level fieldsets (normally 5 including the last item, 10 nested fieldsets).

1) The biggest issue have been nested fieldsets. I was trying to to put different markups within the same custom fieldset field template.

The top-level fieldset got a markup for being used as an accordion wrapper except the last item (not used as an accordion).

The last fieldset item in the top level had validation errors therefore I had to remove this fieldset for a dirty spacer solution to get it working (validate and sending e-mail). You can look at the attached custom fieldset template. [fieldset.html.twig.zip](https://github.com/getgrav/grav-plugin-form/files/1741464/fieldset.html.twig.zip)

2) Group of radio buttons

I have seen the there is currently no possibility to use a fieldset for a group of radios to give a semantically correct structure:

e.g visual structure:
Gender *
o male o female

this should ideally get the following simplified markup (for better understanding):

```

Gender *
Male

Female

```

instead of this markup it is only possible to get the following structure via the following yaml field definition, which lead to an orphaned label (form-label) to get the visual structure shown above:

```
-
name: gender1
label: Gender
type: radio
outerclasses: row
innerclasses: col-md-6
options:
man: Male
woman: Female
validate:
required: true
```

turns into:

```

```
Nonetheless I got the form working, but for accessibility it's an error. Therefore I am asking if there are any plans for any enhancements concerning this usecase. Because this would be an another enormous win for grav as a system to achieve perfect markup with ease and speed! :)