[Feature request] Allow dragging Assign into Multiple Assign

It would be nice to add a feature to allow dragging simple Assign activities into Multiple Assign ones so it would automatically convert them from one type to another. Sometimes you start whit a single Assign activity, then you realize later that you need to assign some other ones in the same area of the workflow and finally you end up with a bunch of these Assign activities, and hand-converting them to Multiple Assign is tiresome.

This is a fair suggestion. We will look into it.