Fix width of tx table cells

[nop33]

Closes #158

I connected my local explorer app to https://backend-v111.mainnet.alephium.org to verify that the fix works with the problematic transaction that was reported on mainnet and it seems to work:

[mvaivre]

Thanks, doing the functional testing now (checking other tables for potential side effects)

[nop33]

Functional tests on my local env as well as on testnet pass ✅