[Request][Serverless & 8.15]: Expandable flyout setting being removed from advanced settings

[nastasha-solomon]

Description

The securitySolution:enableExpandableFlyout advanced setting is being removed from the Advanced Settings UI and the expandable flyout will be enabled by default wherever it's used in the Security app.

If users want to revert back to the old flyout while they're on 8.15, they can do so by enabling the expandableFlyoutDisabled feature flag in the kibana.yml file. This does not need to be doc'd for Serverless or ESS (8.15).

Background & resources

• PRs: [Security Solution][Expandable flyout] - replace advanced settings with feature flag kibana#184169
• Issues/metas: N/A
• Point of contact: @PhilippeOberti
• Test environments: Use QA-NonCanProd envs for Serverless and one of the internal test servers for 8.15

Which documentation set does this change impact?

ESS and serverless

ESS release

8.15

Serverless release

TBD

Feature differences

N/A

API docs impact

N/A

Prerequisites, privileges, feature flags

N/A

[nastasha-solomon]

Will need to remove docs for the securitySolution:enableExpandableFlyout setting in the following places:

• Configure advanced settings | Display the expandable flyout
• View detection alert details

Same pages need to be updated for 8.15.

[nastasha-solomon]

We still need to decide how to release-note this change for 8.15. Is the new feature flag considered an enhancement? Should we release-note that the old flyout was in the process of being deprecated in 8.10? I'll need to discuss this with @PhilippeOberti and @paulewing before starting the 8.15 release notes.