I love the favourites tool. Works very well. WiIl favourites be added to this panel as well?
I find the drag and drop method of adding actions very awkward as I have to use trackpad instead of a mouse. Actually it doesn't even work if you use tree view for your actions steps builder. But I will open a bug report for that.
But so far it seems to be working great. Well done. 
Edit: Hmmm, drag and drop suddenly started working in tree view.