We haven't posted an update about this in a while, and I'm sorry about that.
This is quickly becoming our most requested feature, and it is something we want to do.
In the interest of full-disclosure, we spent a lot of time on this last year but had to scrap that implementation because it affected the overall stability of the app.
That being said, we are going to come back to this soon. We are in the middle of a big push for updated desktop apps, and once that is done, we will jump back into this.