On-chain failed transactions have a transaction status of `confirmed`,
and should not be retried. Our retry function doesn't handle on-chain
failures yet, so it would inevitably fail due to the transaction having
the same nonce as a confirmed on-chain transaction.
When determining whether to show the retry button in the UI, we had
mistakenly been using a `status` variable that determined whether we
should show "Failed" on that transaction in the activity log. That
display status includes both network and on-chain failures, unlike
the `txMeta.status` property.
The `showRetry` logic has been updated to ensure it's only shown when
`txMeta.status` is `failed`, meaning on-chain failures will no longer
show the retry button. Additionally, the display-specific `status`
variable has been renamed to `displayedStatusKey`, to indicate that it
is a string that corresponds to a localized message, and that it's the
status meant for display purposes.