Commits on Sep 27, 2024

1. Add tooltips to Discover button icons (elastic#192963) …

   ## Summary
   
   When navigating through elements in Discover with a keyboard, icon-only
   buttons don't show their browser-native title attribute when focused,
   only when hovered.
   
   This makes it unclear when you "tab in to" an icon-only button what the
   button does.
   
   These changes add a tooltip on the filter in/out buttons on the field
   list values.
   
   |    Before    |    After     |
   | :----------: | :----------: |
   | ![CleanShot 2024-09-15 at 21 20
   36@2x](https://github.com/user-attachments/assets/ed915d78-fc66-4eb4-a4d7-d7c3395edfc6)
   |![CleanShot 2024-09-15 at 21 17
   23@2x](https://github.com/user-attachments/assets/0d7b9862-b8ab-4a2c-bc4b-8b790c393001)
   |
   
   ### Checklist
   
   - [x] [Unit or functional
   tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
   were updated or added to match the most common scenarios
   - [x] Any UI touched in this PR is usable by keyboard only (learn more
   about [keyboard accessibility](https://webaim.org/techniques/keyboard/))
   - [x] Any UI touched in this PR does not create any new axe failures
   (run axe in browser:
   [FF](https://addons.mozilla.org/en-US/firefox/addon/axe-devtools/),
   [Chrome](https://chrome.google.com/webstore/detail/axe-web-accessibility-tes/lhdoppojpmngadmnindnejefpokejbdd?hl=en-US))
   - [x] This renders correctly on smaller devices using a responsive
   layout. (You can test this [in your
   browser](https://www.browserstack.com/guide/responsive-testing-on-local-server))
   
   (cherry picked from commit c12c361)

   

   smith committed Sep 27, 2024
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