Hi @allthingsGJD, @magicmark, @PeterDimitrov, @ColibriMedia and @Cricitem, I have an update, the resizing of desktop still works, however to resize the Desktop view,the viewport is currently dragged from the left side, take a peek at this quick video:
https://cl.ly/b6d6a0588fa7/Screen%252520Recording%2525202018-10-03%252520at%25252008.36%252520PM.mov
Our team is taking a look at add/restoring handles to the Desktop view port on the right hand side of the viewport, but I cannot give you an exact timeline on this.
I hope this helps, let me know if further questions on that.