[Search:Indices:Pipelines page] Manage button missing focus after closing or cancelling the dialog

[L1nBra]

Description
Focus order should be in sequence and visible in order for user to know on which element he/she is at the moment. Especially for the users, using only keyboard.

Preconditions
Stateful Indices -> Pipelines page is opened.

Steps to reproduce

1.Navigate to Manage button while using only keyboard by pressing Tab key.
2.Press Enter.
3.Press Tab.
4.Press Enter (dialog opens).
5.Navigate to x (close) button or Cancel button.
6.Press Enter.
7.Observe the page.

UI elements

Actual Result

• No focus on Manage button, if pressing Enter key - button doesn't get activated.
  No focus after pressing Enter on Delete pipeline button.

Expected Result

• Focus should be on Manage button.
  After pressing Enter on Delete pipeline, it would be better to have focus on the first element on the page (for this page probably Pipelines tab would be better).

Meta Issue

Kibana Version: 8.16.0-SNAPSHOT

OS: Windows 11 Pro

Browser: Chrome Version 129.0.6668.101 (Official Build) (64-bit)

WCAG or Vendor Guidance (optional)

• Understanding SC 2.4.3: Focus Order (Level A)(https://www.w3.org/WAI/WCAG22/Understanding/focus-order.html)
• Understanding SC 2.4.7: Focus Visible (Level AA)(https://www.w3.org/WAI/WCAG22/Understanding/focus-visible.html)

Related to: https://github.com/elastic/search-team/issues/8256

[elasticmachine]

Pinging @elastic/kibana-accessibility (Project:Accessibility)

[daveyholler]

Heads up to the engineer that picks this up... this will likely be the same case for the Connectors and Crawlers pages with Pipelines tabs

[erikcurrin-elastic]

This probably requires a simple CSS change to indicate focus for the component