Allow users to edit fields (Name, RPC URL, ChainId, Currency Symbol, etc) on notification prompt for `wallet_addEthereumChain` calls.

[adonesky1]

[vandan]

@adonesky1 Is this something that needs attention from the dapp API team?
We had trouble triaging this one without more background on this issue, but it looks like you are already working on it. Can you add a little more information and context about the problem in this issue?

[adonesky1]

Hey @vandan yeah basically this was an idea some folks through out as a better longer term solution for the quick fix recently merged here. So we should allow users to modify individual fields like Currency Symbol or Network Name when we show them a warning/error message indicating that the symbol might be incorrect:

[vandan]

If we are going to allow changes to the requested network addition, then the return signature should be changed in order to notify the dapp that a different network was added. cc @BelfordZ