Drag and drop from foobar2000 to Mp3tag to replace File List does no longer work with v3.28a

[ohrenkino]

@rboss

drag-and-drop to load files

This also a change in 3.28a:

@Florian

CHG: use link instead of move drop effect when dropping files to File List to prevent files being removed from the drop source. (#63359, #66931)