gdk4-win32: Guarantee dnd-move as a cursor name
gdk-win32 currently falls back to the default cursor, which may not be appropriate for rendering a DnD move.
This is similar to what was done on Wayland side in !7070 (merged)
gdk-win32 currently falls back to the default cursor, which may not be appropriate for rendering a DnD move.
This is similar to what was done on Wayland side in !7070 (merged)