Handling MetaMask chain switching #141
Description
The MetaMask synchronisation has been improved, but there isn't any validation of the network currently selected.
Officially, we support pairs of XE mainnet <-> Ethereum Mainnet and XE testnet <-> Rinkeby Test Network but this isn't meaningfully enforced or validated.
This means that it is possible to lose EDGE by depositing from the wrong network.
We should tighten this up, and perhaps forcibly disconnect/reset the deposit modal if an invalid network is selected.