Method: Hooked to admin_body_class to add a class for the update or welcome page

Method: Dynamically registers the splash page when required.

Method: Prints the splash screen.

Method: Listen for opportunities to show update and welcome splash pages.

Method: Filter the Default WordPress actions when updating the plugin to prevent users to be redirected if they have an specific intention of going back to the plugins page.

Method: Maybe redirect to the welcome page (or to the update page – though this is currently disabled).

Method: Handles the update/welcome splash screen.