(Accessibility) Visualize/Lens - Missing Keyboard Navigation

[barlowm]

Steps to reproduce

1. From Kibana Home Page, use the side navigation bar to navigate to the "Visualize" page
2. Click the "Create visualization" button
3. Click the "Go to Lens" button
4. Navigate to the controls to "Drop a field here" for the "X-axis"
5. Select "Drop a field here", a popup is displayed to select a field
6. Can't select a field via keyboard only.

Kibana Version:
7.8

OS:
Windows 7

Browser:
Chrome

Screen reader: [if relevant]
NVDA

Relevant WCAG Criteria: WCAG Criterion - Level A/AA/AAA
2.1.1 Parsing Level A

Relevant ARIA spec: WAI-ARIA Authoring Practices
N/A

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[wylieconlon]

I actually think this has been fixed in the upcoming 7.10 release because we've redesigned the dimension editor. Closing as fixed.