Bridge: black screen bug when wallet connected to other network

[steezeburger]

The app crashes when it loads and the wallet is connected to a different network not in our list of EVMs.

Recreate:

1. use metamask to connect to arbitrum network
2. go to bridge
3. notice error

Could catch and ignore the error as a quick fix I think, because network will get correctly connect when the user interacts with the wallet selector.
Better fix might be to ask to switch networks when the wrong one is detected, but is that the best ux?

[steezeburger]

This is a duplicate of astriaorg/astria-bridge-web-app#93, but for this repo.

it doesn't make sense to fix twice. I think we will just be releasing this new bridge with swap all at once.