This overhaul of the docs structure puts Kibana's documentation more
inline with the structure that is used in Elasticsearch. This will help
us better organize the docs going forward as more docs are added.
This also includes a few necessary content changes for 5.0.
Since we introduced the ability for users to manually manipulate some of
the JSON used in Elasticsearch requests in the form of of the filter
editor in 4.3, it's possible that saved objects are taking advantage of
then-deprecated and now-removed Elasticsearch functionality.
This calls out that possibility and links to the Elasticsearch breaking
changes documentation for more information. Even though this is
technically not a Kibana BC break, it manifests as if it were an issue
with Kibana since it results in broken
searches/visualizations/dashboards.
Fixes#8511
