Modded and fixed issue when token image loading failed

[alfetopito]

Summary

Part of #438

Fixed one issue that was causing the dev build to blow up with an unhandled exception when the token list image failed to load.
That wasn't visible on prod as it was just swallowed and logged as an error in the console.

Now it's handled and logged as a warning.

To Test

1. On mainnet, go to manage token lists

• There should be a warning about an image not being found like this
  
• If you running this locally, this page should no longer crash

Note

I did not manage to fix the issue on #438
Need some CSS help on that front

[github-actions]

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[alfetopito]

The only effective change in this whole mod

[github-actions]

• 🔭 GP Swap: CoW Protocol v2 Swap UI

[elena-zh]

Hey @alfetopito , is this OK that 'CowProtocol' token list's image cannot be loaded in this PR?
GC:

Mainnet:

[alfetopito]

Hey @alfetopito , is this OK that 'CowProtocol' token list's image cannot be loaded in this PR? GC:

Mainnet:

Does that happen on production?
I suspect it might be some setting in our dev environment, as it's nothing new AFAICT

[elena-zh]

@alfetopito , no, the list icon looks good in Production

[alfetopito]

Not sure what could be happening but looks like an issue in your side Elena.
Maybe you have a browser setting or an add-on that's blocking those requests?

I've just tested with the link from this PR

[alfetopito]

Regardless, those images are unrelated to the changes here. I'll merge the PR as is

[elena-zh]

@alfetopito , I switched off my add blocker and it started to show icons.
Thank you!