Inconsistent layout of Edit: Group screen.

Summary

For some reason, the Admin -> Overview -> Groups -> Edit: Group screen has inconsistent layout.

Possible fixes

✏️ Figma work file

Use a single presentation layout for settings. Similar examples:

Settings	Edit Project	New Screen

Implementation plan

1. Add - @content_class = "limit-container-width" unless fluid_layout to the top of app/views/admin/groups/edit.html.haml
2. Adjust the HTML structure in app/views/groups/_group_admin_settings.html.haml so the labels are above the inputs.
3. Adjust the width of the inputs in app/views/shared/_group_form.html.haml.
4. Use the GitLab UI form builder to update the checkbox styles in app/views/groups/_group_admin_settings.html.haml#L5 and app/views/groups/_group_admin_settings.html.haml#L29
5. Use the GitLab UI form builder to update the radio button styles in app/views/shared/_visibility_radios.html.haml#L5