Move widgets in Customiser way harder in 4.3

In the previous version it was quite trivial to move widgets from one sidebar to another, simply by dragging them into the new location. That is gone with the new version and that is disappointing to me, considering that I relied very frequently on the prior behaviour.

As it is now it takes quite some effort to reorganize a widget based homepage for example, forcing the users to navigate back and forth multiple times.