Add support for apps supplying their icons at run-time

A good solution might just be to let clients create a surface of new type 'icon'.

Status changed to 'Confirmed' because the bug affects multiple users.

That kind of depends on what we want to allow apps to do - do we want them to be able to animate their icon?

It does open an attack vector when apps can start impersonating another and steal credentials, for example.

A static icon has the advantage of being visible on the store - and it will always be the same on your device.

Yes, I think providing a static image once is sufficient. Like a MirGraphicsRegion.

However there is no good reason to limit the number of times an app can upload a new icon. Certainly you would create bugs by limiting when and where the icon gets set. An app is allowed to set its icon at any time, and failure to honour that is a shell bug - not something we could or should ask app developers to fix if their app has worked perfectly elsewhere for years.

So I understand your concern, but solving the impersonation problem is worse than not solving it :)