Transparency gone from drag and drop under Wayland

The fix that allows dragging and dropping credentials, at all, also breaks the transparency that facilitates hitting the drop target. It only occurs when the ELECTRON_OZONE_PLATFORM_HINT=auto environment variable is set, and it makes the content fully opaque, complete with little black triangles at the corners, outside the rounded blue corners of the dragged item.

Tested on beta channel 1Password for Linux 8.11.10 (81110032)