Wallet connection

[e-roy]

A list of issues noticed from a live test of https://dark-steel.surge.sh/

• [x] wallet doesn't check if user is on the correct network
• [x] mint button can be pressed if user's wallet isn't connected
• [x] success popup from minting comes up even after an error in minting
• [ ] wallet doesn't stay connected after page refresh

[e-roy]

Correct network, mint button and success popup issues were fixed in PR