Fixes in searching and result list

[lilimelgar]

These are some suggested improvements to the vocabulary registry's result list:

• Update the elastic search settings to use so plurals and compound words are matched more flexibly, e.g., if a user searches for "person" retrieve also: Persons in Context (and some of the other 6 vocabs that currently are about persons and have "person.*" in the title or description. Currently it only retrieves 2: https://registry.vocabs.clariah.nl/?FREE_TEXT=person&page=1
• Ignore caption in alphabetical sorting (e.g., see that "schema.org" appears as last in the list, not in the alphabetical order.