fix: hide modal upon keyboard blur

[darkwing]

Description

This change mimics the mousedown event of Modals, extending the same functionality to blurring the Modal via tabbing out of the first or last element via the keyboard tab key. With this PR, if you tab off of the first or last item of a given modal, the modal is closed, just clicking outside the Modal would.

Test plan

1. Click the top bar's "..." item
2. Continuously press [tab]
3. When tabbing off the last item, the modal will close
4. Click the top bar's "..." item
5. Press shit-tab to bail out of the first item, see the modal close

Visual

https://github.com/Uniswap/interface/assets/46655/c00fd817-4402-41f0-a6d9-01c39caf024f

QA (ie manual testing)

• [ ] N/A

Devices

Automated testing

• [ ] Unit test
• [ ] Integration/E2E test

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Name	Status	Preview	Comments	Updated (UTC)
interface	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 12, 2023 2:32am

[codecov[bot]]

Codecov Report

Merging #7457 (08a46a2) into main (5fee3c6) will decrease coverage by 0.10%. Report is 9 commits behind head on main. The diff coverage is 100.00%.

Flag	Coverage Δ
cloud-tests	?
unit-tests	42.82% <100.00%> (+<0.01%)	:arrow_up:

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[infredible]

lgtm, thanks for the fix!

[darkwing]

Bump on cloud tests?