Dismiss nav dropdown on anchor click

[dstaley]

🎟️ Asana Task
🔍 Preview Link

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Description

Currently, when a dropdown nav menu item triggers a client-side navigation, the dropdown menu isn't dismissed. This PR updates the click handler for dropdown menu items to dismiss the menu when the clicked on element is an anchor tag with a truthy href property.

Before

2021-11-15.15-28-07.mp4

After

2021-11-15.15-30-52.mp4

PR Checklist 🚀

Items in this checklist may not may not apply to your PR, but please consider each item carefully.

• Add Asana and Preview links above.
• Conduct thorough self-review.
• Add or update tests as appropriate.
• Conduct reasonable cross browser testing for both compatibility and responsive behavior (We have a Sauce Labs account for this, if you don't have access, just ask!).
• Conduct reasonable accessibility review (use the WAS as a guide or an axe browser plugin until we establish more formal checks).
• Identify (in the description above) and document (add Asana tasks on this board) any technical debt that you're aware of, but are not addressing as part of this PR.

[changeset-bot]

🦋 Changeset detected

Latest commit: 7d2ad90

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@hashicorp/react-subnav	Minor

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🔍 Inspect: https://vercel.com/hashicorp/react-components/8iULGVbbQh5MvF2d3q87qU2CH7gW
✅ Preview: https://react-components-git-dsdismiss-subnav-dropdown-hashicorp.vercel.app

[BRKalow]

👏

[kylemac]

this makes me so happy

[jescalan]

🙌 big wins