It would be very useful if the Folder widget when it is in a state that shows the current activity's pinned documents (either when the plasmoid is on the Desktop or when the plasmoid is as a icon in the panel) could accept dropping documents in it... So the user could drag a document from dolphin for example and drop it on the Folder Widget and that document would be pinned in the current Activity if the Folder widget has been set by the user to behave in that way... Reproducible: Always
I feel that should be implement in the activities kioslave. It could provide a drop action that shows up in the popup on drop. Reassigning.
Yes, this is something for kactivities KIO. I had some reason why I thought this might lead to problems, but I can't remember it now, so I'll mark it as 'assigned' :)