Change explorer link to mainnet

[timbrinded]

This line here:

mineral-app/src/View.elm

Line 228 in 0792d42

|> linkOut ("https://suiscan.xyz/testnet/account/" ++ wallet.address) [ Font.underline ]

has the hardcoded link to testnet for the generated miner address. Can we change this to mainnet, or if there's requirement have it as a flag to switch between envs controlled either by ui control (WebApp) or environment variable (CLI)