In the Tasker preferences -> UI, List Item Dragging has the option When Selecting, With Menu Option. This works perfectly for me, except for one thing.
When selecting a profile, task or scene a 'trash can' icon appears in the title bar so the selection can be deleted.
However, when selecting an action in the task edit screen no 'trashcan' icon appears. The user is forced to cut the actions to Tasker's clipboard to delete them. See attached screenshots.