VACMS-28709 in this section a11y iOS fix

[chriskim2311]

Note: Delete the description statements, complete each step. None are optional, but can be justified as to why they cannot be completed as written. Provide known gaps to testing that may raise the risk of merging to production.

Summary

In this PR we add markup to the div containing the accordion dropdown to allow the cursor in iOS to stay once the drawer is open.

Related issue(s)

department-of-veterans-affairs/va.gov-team#28709

Testing done

Hard to test this in iOS. But checked that the new markup is showing locally.

Screenshots

What areas of the site does it impact?

(Describe what parts of the site are impacted if code touched other areas)

Acceptance criteria

Quality Assurance & Testing

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Linting warnings have been addressed
• Documentation has been updated (link to documentation *if necessary)
• Screenshot of the developed feature is added
• Accessibility testing has been performed

Error Handling

• Browser console contains no warnings or errors.
• Events are being sent to the appropriate logging solution
• Feature/bug has a monitor built into Datadog or Grafana (if applicable)

[laflannery]

@chriskim2311 Shamia and I took a look and we have a few comments:

• Is it possible to have the ESC key available to close the modal/dialog? This is extremely helpful for SR users when dialogs are involved so they don't have to find the Close button.
• We also noticed that the aria-labelledby attribute was missing on the dialog:
  
• And for the Nav itself, can you wrap this in a semantic <nav> tag with an `aria-label="Secondary" Like this has on desktop?
  

We also noticed a difference in the styles regarding the active page and subnav, screenshots below:

[chriskim2311]

@laflannery Added the changes from your comments ready for you to re-review thanks!

[laflannery]

Looks great, approved! Shamia and I both want to test this on real mobile though once it's merged. Will you ping one or both of us once it's in staging?