Bug 26970: Add row highlight on drag in Elasticsearch mapping template

Bug 26970: Add row highlight on drag in Elasticsearch mapping template

In Elasticsearch mapping tables :
In order to better see which row is currently in drag-an-drop,
add an highlight color like in circulation and fine rules when editing a row.

Test plan :
1) Go to Administration > Search engine configuration (Elasticsearch)
2) In each table : biblio, authorities, facets
3) Clik on a row to start a drag => See row turning orange
4) Release to drop => See row turning back to original color

https://bugs.koha-community.org/show_bug.cgi?id=26970
Signed-off-by: Séverine QUEUNE <severine.queune@bulac.fr>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>