Allow editors to update custom options pages

According to this ticket there was a bug in the Settings API so that regardless of the role capability set in the add_submenu_page() call the required capability would still be “manage_options”.

I’m trying to use the implemented patch but with no success. Could someone take a look at my code and try to help me out?

The following code runs in /mu-plugins/ which might be of relevance.

function set_option_page_capability() {
	return 'edit_theme_options';
}
add_action('admin_menu', 'create_menu');
function create_menu() {
	global $array_of_option_pages; //set in the_current_theme/functions.php
	foreach ($array_of_option_pages as $settings_page => $options) {
		$settings_page_slug = sanitize_title($settings_page);
		add_filter('option_page_capability_'.$settings_page_slug, 'set_option_page_capability');
		add_submenu_page(
			'themes.php', 			//parent menu
			$settings_page, 		//page title
			$settings_page, 		//menu title
			set_option_page_capability(),	//role capability requirement
			$settings_page_slug, 		//url
			'render_settings_page' 		//display output function callback
		);
	}
}