Move "Advanced Search" Elasticsearch settings to dedicated admin page
Problem
At present the "Advanced Search" settings are under Admin > Settings > General
which means there is a lot of settings on one page. We plan to add much more settings to this page coming soon as well as more options for the admin to control various things and diagnose problems. This page will become quite crowded and hard to use.
Solution
Move all these settings off this page into a dedicated page Admin > Settings > Advanced Search