[Accessibility] Visualizations short-term issues

[cjcenizal]

Let's try to address these for 6.0.0.

General

• [Accessibility] Search visualization types needs role=search [Accessibility] Search visualization types needs role=search #12886
• [Accessibility] Manage Saved Searches button not accessible via keyboard [Accessibility] Manage Saved Searches button not accessible via keyboard #12890
• [Accessibility] Visualization index pattern header needs id and tabindex [Accessibility] Visualization index pattern header needs id and tabindex #12891
• [Accessibility] Close / open fieldset buttons need better descriptors [Accessibility] Close / open fieldset buttons need better descriptors #12892
• [Accessibility] Visualization edit range fields not paired properly with fields [Accessibility] Visualization edit range fields not paired properly with fields #12894
• [Accessibility] Visualization Select Bucket type not accessible via keyboard editor [Accessibility] Visualization Select Bucket type not accessible via keyboard editor #12895
• [Accessibility] Data Table Fields not paired properly with labels [Accessibility] Data Table Fields not paired properly with labels #12896
• [Accessibility] Range fields in gauge / goal / metric (and likely others) visualization style not paired properly with labels [Accessibility] Range fields in gauge / goal / metric (and likely others) visualization style not paired properly with labels #12897
• [Accessibility] More field / labels that need pairing [Accessibility] More field / labels that need pairing #12898
• [Accessibility] Visual Builder main tabs not keyboard accessible [Accessibility] Visual Builder main tabs not keyboard accessible #12899
• [Accessibility] Visual Builder "Auto Apply" field needs proper labeling [Accessibility] Visual Builder "Auto Apply" field needs proper labeling #12900

"Chrome"

• Can't tab through visualization sidebar tabs Accessibility: Can't tab through visualization sidebar tabs #11539
• Don't autofocus Visualize query bar Accessibility: Don't autofocus Visualize query bar #11856
• Don't autofocus Saved Searches Filter Don't autofocus Saved Searches Filter #12888
• Visualize side bar form labels and controls should be associated Accessibility: Visualize side bar form labels and controls should be associated #11859
• [Accessibility] Visualization Module lacking header [Accessibility] Visualization Module lacking header #12885
• [Accessibility] Visualization Type tooltips need to be read by screen reader [Accessibility] Visualization Type tooltips need to be read by screen reader #12887

Charts

• Show a warning for non accessible visualizations [Accessibility] Show a warning for non accessible visualizations #13572

Markdown

• Dark theme markdown visualization's "blockquote" element fails color contrast [Accessibility] Dark theme markdown visualization's "blockquote" element fails color contrast  #12491
• Markdown type field not paired with label [Accessibility] Markdown type field not paired with label #12904

[cjcenizal]

CC @thomasneirynck @ppisljar

[timroes]

Everything that doesn't make it into 6.0 anymore, should be moved to the phase 2 issue #13560 for 6.1.