[EuiDataGrid] Vertically center toolbar `additionalControls` items

[janmonschke]

Summary

I recently noticed that the alerts table toolbar in security has items that were not vertically centered. I created fixes for that in Kibana but I think the actual fix would be to add align-items: center; to the actual wrapper classes, hence this PR. [Kibana PR]

Alerts table before:

Alerts table after:

TODO:

• [ ] Revert https://github.com/elastic/kibana/pull/196804 when this PR makes it into an EUI update in Kibana

[cee-chen]

I think my only hesitation is this might affect other data grids in Kibana that have custom toolbar items that prefer top alignment - I'm not sure what those cases might be, but I'm also don't have every Kibana datagrid memorized 😅 I took a quick peek at Discover and Lens and those look like they should be fine, so I'm good with moving forward with this, but we should add a changelog for this to surface it to consumers just in case. I'll add one here shortly

[kibanamachine]

Preview staging links for this PR:

• Docs site: https://eui.elastic.co/pr_8085/
• Storybook: https://eui.elastic.co/pr_8085/storybook
• New docs: https://eui.elastic.co/pr_8085/new-docs

[elasticmachine]

:green_heart: Build Succeeded

• Buildkite Build
• Commit: 1b8e36144261c118787d7b272c78e399d70e2ae2

History

• :green_heart: Build #2913 succeeded cb09b19e36ce5f71d65e012fc919f7cb0a2b86a7

[janmonschke]

@cee-chen thanks for adding the changelog and reviewing this PR so swiftly :)

[janmonschke]

@cee-chen Is there an epic or sth similar that I could follow to get notified about the next EUI release?

[cee-chen]

No epic, but generally EUI changes will reach Kibana in 1-2 weeks. You can peek at the EUI tag in Kibana. We're going to do another release for the currently in-draft PR so it's likely this change will reach Kibana by end of next Friday.