…e of success (#27810)

Linea seems to be taking longer than other chains to process the approve
transaction after it is submitted, so the trade transaction is erroring.
This PR adds a hacky workaround where we artificially delay if we're on
Linea to give the trade transaction more time. In the future, we'd want
to avoid this hack, but for now it should increase the swap success rate
on Linea.

With the delay, the token symbol also wasn't immediately populating on
the awaiting swap page, so this PR also updates how it's retrieved.

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Fixes: #27804

1. Start a swap on Linea with a token that you have not granted approval
for
2. Observe that the swap does not fail

https://github.com/user-attachments/assets/57cdc5e5-cea7-48ad-ba13-38820ecc9155

https://github.com/user-attachments/assets/91bbfbf4-8392-41ea-bfe8-d54813758f5c

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