fix: ignore user rejection from metamask

[just-toby]

ensures we don't show the error modal when metamask rejects a transaction

test plan

verified this is working as expected by rejecting a transaction with metamask

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widgets	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 16, 2023 at 5:48PM (UTC)

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:tada: This PR is included in version 2.48.4 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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