The upgrade went .... smooth! This is my notes.

This guide shows you how you easily can convert your obsolete MVC gadgets to Component without being a dojo guru. With or without MVC pattern.

How to extend Episerver Forms with a hidden QueryString/HttpPost Value Element.

How to read a querystring value from the referrer/hosted form page. Also how to read a page property from the submitting page.

2 min reading how you can customize and override the CSS in Episerver UI admin with help of module system.