Text to go in the release notes:
This new page (admin/searchengine/elasticsearch/mappings.pl) will permit to manage the ES mappings.
For the biblios and authorities indexes, the different mappings can be managed from this single page.
The interface let you add, remove and update mappings and search fields. It's also possible to reorder the mappings, as the order can be important in the indexation process.
Note that the table can be displayed in a
different order that the one it was before saving, but the mappings are grouped by search field and the order inside the search field is preserved.
Limitations: If something went wrong during the insertion/deletion/modification, the users will loose all these changes.