refactor(admin): move the smilies page to Twig
/admin/emoticons becomes @admin/smilies.twig and the controller returns
ViewResponse.
The old smilies.phtml is deleted rather than migrated: no code renders
admin::smilies, and the file holds a layout call and nothing else.
ViewResponse.
The old smilies.phtml is deleted rather than migrated: no code renders
admin::smilies, and the file holds a layout call and nothing else.