GravityEdit - Filter the jQuery UI theme

gravityedit-filter-editable-style.php

<?php

/**
 * @filter `gravityview-inline-edit/jquery-ui-theme` Modify the jQuery UI theme to use, if jQuery UI editor style is active
 *
 * @since 1.0
 *
 * @param string $jquery_ui_theme Name of jQuery UI theme to use. Default: "base"
 *
 * @see http://jqueryui.com/themeroller/#themeGallery for examples
 */
add_filter( 'gravityview-inline-edit/jquery-ui-theme', function( $old_theme = 'base' ) {
    return 'dark-hive';
} );