[Accessibility] Management Phase 2 issues

[timroes]

These accessibility issues should be addressed until 6.1.

• [Accessibility] Discussion: main and section tag structure [Accessibility] Discussion: <main> and <section> tag structure #12869
• [Accessibility] Discussion: Tab Order of search / delete / export buttons [Accessibility] Discussion: Tab Order of search / delete / export buttons #12871
• [Accessibility] Incorporate Advanced Settings Warning into Screen Reader Flow [Accessibility] Incorporate Advanced Settings Warning into Screen Reader Flow #12873
• [Accessibility] Configure an Index Pattern form's secondary links inaccessible via keyboard [Accessibility] Configure an Index Pattern form's secondary links inaccessible via keyboard #12867

[chrisronline]

@timroes Do you have an update on the three remaining issues? Did you need me or @BigFunger to jump in and help?

[timroes]

@chrisronline The advanced screen reader flow is something rather easy (just add an aria-describedby). So if you have some time please feel free to take this one. The tab order was currently blocked by the redesign, so any news from you there? :-) And I can take over the main and section if you wish to.

[chrisronline]

Closing as these all seem done now!