Metamask should be enabled for other networks

[rstormsf]

https://github.com/MyCryptoHQ/MyCrypto/blob/develop/common/selectors/config/wallet.ts#L68

This is not true. Metamask works fine with any other network by using Custom RPC option.
I don't think you should only let those whitelisted networks to only work with MyCrypto...

[wbobeirne]

You're totally right, but I actually think enabling / disabling MetaMask needs even more overhauling. Basically, we just use the network MetaMask is configured with at the time of connecting. It doesn't actually respect the dropdown in the top right, it just uses whatever you've configured in the MetaMask chrome extension. So we should probably do one of two things:

1. Just enable Web3 all the time, since it's going to change to the right network anyway, or
2. Disable Web3 unless its network matches the one that you're currently connected to on MyCrypto. We can check window.web3.version.network against the network chain id.

I think 1 is the best solution for ease of use, but it's important that we communicate to users when they switch networks.

[dternyak]

@wbobeirne How do you think we can best communicate that the user has switched networks when they unlock metamask with different network selected in the dropdown? Perhaps a simple showNotification message?