data-device: fix drag-and-drop
Test plan: try out weston-dnd.
Depends on #1515
Fixes https://github.com/swaywm/wlroots/issues/1288
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Test plan: try out weston-dnd.
Depends on #1515
Fixes https://github.com/swaywm/wlroots/issues/1288