Add classes to form containers on edit-tags.php

[jarednova]

If a user wants to suppress or modify the containers of form fields on the tags page, there's no reliable way to do so without resorting to jQuery manipulation.

For example, I want to hide the default "description" box from the admin for a particular taxonomy. By adding a few classes, WordPress can give the themer ultimate control over what gets displayed in the admin.

Right now, all of these divs are simply ...

<div class="form-field">

This diff adds info so that these wrappers can be individually styled/controlled/suppressed..

<div class="form-field term-slug-wrap">

[jarednova]

Git diff for adding classes to edit-tags.php

[jarednova]

... I'm totally open to finding a better class naming system, consider this a first pass. Thanks!

[jarednova]

I've added #29348 as a companion ticket to apply the same wrapper methodology to user-edit.php

[jarednova]

... and a quick screenshot to illustrate the effect this has on the markup:

[SergeyBiryukov]

In 29803:

Add classes to form containers on taxonomy screens.

props jarednova.
fixes #28196.

[jarednova]

Thanks @SergeyBiryukov -- my first addition to core. Really proud to make it in!