The 'admin' module will be split off from 'framework',
where 'framework' only provides (mostly) frontend-agnostic PHP classes.
For example, HTMLEditorField.php has a TinyMCEConfig.php driver,
but doesn't come with its own JS includes.
API: Remove InlineFormAction::includeDefaultJS()
Developers must now take responsibility for including the necessary JS
and CSS themselves. This has been implemented in the admin, but not
in other use-cases.
