fix: Do not rerender approval editor in confirmation modal

[schmanu]

What it solves

Avoids rerenders of approval editor, when the queue gets polled

Resolves #2003

How this PR fixes it

Memoize prop for approval editor

How to test it

1. Queue a transaction containing approval(s)
2. Wait ~10-15s
3. Witness the approval editor rerendering

Checklist

• I've tested the branch on mobile 📱
• I've documented how it affects the analytics (if at all) 📊
• I've written a unit/e2e test for it (if applicable) 🧑‍💻

[github-actions]

Branch preview

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https://fix_approval_editor_rerender--walletweb.review-wallet-web.5afe.dev

[github-actions]

ESLint Summary View Full Report

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Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	0	N/A

• Result: ✅ success
• Annotations: 0 total

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^{Report generated by eslint-plus-action}

[katspaugh]

👍

[francovenica]

Made a comment in the original issue that i wasn't able to reproduce the issue but I wasn't looking in the right place. I found it now, so I was able to reproduce it.

LGTM
I'll post how it looks before and I can confirm that now that flicker doesn't happen anymore with the fix