Is your feature request related to a problem? Please describe:

Let's say I'm displaying a user with their profile picture everywhere, then the user changes their profile picture. I want to update all copies of it at the same time.

Is it possible to construct a solution with the existing API?

I think so. Every time I create a new canvas.Image, I can store a reference to it in a slice. Think map[string][]*canvas.Image where the string is the user ID and the slice contains every image I've created for that user across the entire app. Then, when the profile picture is changed, I would iterate over that slice and for each image assign a new fyne.Resource and call Refresh(). This feels sub-optimal.

Describe the solution you'd like to see:

Something like:

profilePicture := binding.NewBytes(originalImageBytes)
canvas.NewImageFromBinding(profilePicture)

// Later on...
profilePicture.Set(newImageBytes)

Does this seem like a reasonable feature? The binding code looks pretty approachable so I might be able to handle that part, the canvas stuff I've explored less.