Elasticsearch version (bin/elasticsearch --version): 7.12.1

Plugins installed: []

JVM version (java -version):

OS version (uname -a if on a Unix-like system):

Description of the problem including expected versus actual behavior:

ILM Rollover max_docs o

Multiple Explore-related components still make use of GrafanaTheme.
Since Grafana 8.0 introduces GrafanaTheme2 and deprecates GrafanaTheme we should migrate to the new theme.

This should probably be done in multiple small PRs that target a small amount of components to make review easy.

Also the following data sources have components that need to be migrated:

• Elasticsearch

Kibana version: master (~7.14)

Description of the problem including expected versus actual behavior:

See Hours vs hours:

Steps to reproduce:
Use duration formatting with the human-readable format and with other options.

**A

As suggested in the ESM guidelines of Node.js it would be good to explicit the type of the module.

{
+  "type": "commonjs",
}