fix(website): hide loading when re-fetching txs information

[nicosampler]

This PR adds a UI improvement when transactions are re-fetching. Now it does not show a spinner when a new re-fetch is triggered, for example, when re-visiting the tab.

Closes #358.

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Latest commit: e079d64

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• lerna run build --ignore cannon-website --ignore @usecannon/indexer --ignore repo --ignore @usecannon/api

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[dbeal-eth]

are there any other places where we have made similar mistakes?

anyway lets merge this asap have heard tons of people complaining about this 😆