TAP5-2273: Validation fix, improve documentation
TAP5-1744: Returning a StreamPageContent instance from any of a Form's events results in "Form components may not be placed inside other Form components" exception
TAP5-2130: Services interfaces that inherit from "Runnable" cause @Startup methods being called twice
TAP5-1404: Add async parameter to Form, EventLink, ActionLink

async enables asynchronous Zone-like behavior without an actual zone