* Moving RPC Urls to network constants
* Including RPC url in switchEthereumChain requestData
* Setting project id to var
* Fix built-in networks switch-ethereum-chain
`switch-ethereum-chain` did not work correctly with built-in networks.
It was treating them as custom networks, rather than as built-in
networks. This affected how they were displayed in the network
dropdown, and resulted in slight differences to the network stack used
as well.
The problem was that `updateRpcTarget` was used, which was meant for
custom networks only. Now that `setProviderType` is used in the case of
a built-in network, the behaviour should match the network switcher
exactly.
Co-authored-by: Mark Stacey <markjstacey@gmail.com>
