Increase z-index of drag shadow for files
Increase z-index of drag shadow for files

The drag shadow is a sibling of "#content" so its z-index must be higher
than the z-index of the content children (navigation bar, app content
and app sidebar) to appear in front of them.

Signed-off-by: Daniel Calviño Sánchez <bd7629e975cc0e00ea7cda4ab6a120f2ee42ac1b@gmail.com>

nextcloud/server,nextcloud/server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,nextcloud/server,nextcloud/server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server