UI enhancement - "Unsupported network. Please switch to Mainnet and refresh." - save me some clicks

There are methods to trigger MetaMask to change the network:
<img width="499" alt="image" src="https://user-images.githubusercontent.com/44369284/203138759-71169654-000a-47fc-8e7a-27584ca7a2f7.png">

After switching network, the PoH should automatically load the requested data.