Feature: #75386 - Get identifier in slide callback

Description

The callback of Wizard.addSlide() now has a new parameter identifier.

Impact

The identifier is passed to the callback function of Wizard.addSlide().

Example code:

Wizard.addSlide('my-identifier', 'Foobar', '', Severity.info, function($slide, settings, identifier) {
	console.log(identifier); // my-identifier
});