Mainnets and Tests now mutually exclusive. Better error messages

• Enabling mainnets and testnets are now mutually exclusive. We noticed that allowing them to be enabled at the same time can be confusing. This is also part of our ongoing attempt to lower the chance of users being scammed.
• Display user-friendly messages instead of cryptic RPC node errors
• Naming a Wallet is now more accessible in Settings

Bug fixes

• Fix: Oneinch/Swap service is available again
• Fix: posting transactions with WalletConnect should show a pending transaction in the Activity tab like non-WalletConnect transactions
• Fix: crashes