Email editor 2.0: possibility to use a token in an image variable

[Grégoire_Miche2]

The new image variable is great as it enables to use them as background images, which was previously difficult (since tokens would not resolve in if mso comments.

But then it is now impossible to set the image using a token. We can only use real images her:

This idea is about having a 4th choice here, that would be a token.

Would be great in conjunction with

-Greg