Categories (?category= the kind), or the +
* beside a category picker in a form (categoryAddButtonHtml(), &inline=1),
* where js/category_form.js saves it in the background and puts it in that
* picker, picked, leaving the form as it was. The fields are
* category_form.php.
*/
require_once '../../includes/modal_header.php';
$category = null;
$kind = categoryKind($_GET['category'] ?? '') ? (string) $_GET['category'] : '';
$kind_config = $kind !== '' ? categoryKind($kind) : null;
$inline = !empty($_GET['inline']);
ob_start();
?>