Implement Edge Chromium support in Kiosk mode ("Assigned Access" in Windows 10)

Choosing Edge Chromium while setting up a kiosk on Windows 10 is finally possible with Windows 10 20H2 (Insiders) and Edge 87. Support for older Windows 10 versions (1909 and up) as well as feature parity with Edge legacy for kiosk-related features should come early 2021 (my guess is before March 9, when https://docs.microsoft.com/en-us/lifecycle/announcements/m365-ie11-microsoft-edge-legacy).

Useful resources:

• https://docs.microsoft.com/en-us/deployedge/microsoft-edge-configure-kiosk-mode
• https://answers.microsoft.com/en-us/microsoftedge/forum/all/does-the-new-edge-browser-work-with-kiosk-mode/08183b71-baba-452b-8fb8-e3b2c113c893
• https://techcommunity.microsoft.com/t5/discussions/windows-10-kiosk-with-edge-chromium/m-p/1862781/highlight/true#M38129