confirmation dialog isn't shown up for copy / move operations via drag&drop

[smakhnist]

If a copy/move operation is performed with a drag-and-drop action, a confirmation dialog should be shown. Currently, the confirmation dialog isn't shown, leading to unintentional copy/move actions (significantly when Mac OS three-fingers gesture is activated).

Alternative solutions could be an extra boolean param "dragDropConfirmationDialog". If it's true - dialog is shown similarly to copy/move actions via F5/F6 keys pressed. The other way around: no dialog is displayed if "dragDropConfirmationDialog" is false.