Action clone: Clone on drag+drop

Idea for extending the new Action Clone. This is in order to create cloned entries anywhere in the task.

The new button could behave differently. As a toggle. If pressed, drag+drop of commands could copy instead of moving them.

Additionally: if more commands are copied, just copy. If one is copied, open it.

But the more I think about it... We can already directly drag, the area is configurable. Maybe a second drag area would make sense, which copies instead moves.