Fix issues when multiple extensions and/or wallets are installed

[rkalis]

Combinations that have been tested and are fully working as of v0.2.6:

• Revoke.cash + MetaMask + Rabby (+ Pocket Universe)
• Revoke.cash + MetaMask + Tally Ho
• Revoke.cash + MetaMask + Coinbase Wallet
• Revoke.cash + MetaMask + Liquality
• Revoke.cash + Brave Wallet + MetaMask
• Revoke.cash + Frame (+ Pocket Universe)
• Revoke.cash + Frame + Coinbase Wallet

Combinations that are not working as of v0.2.6 (unrelated to Revoke.cash):

• MetaMask + Frame (Cannot connect to MM, issue likely on Frame's side)
• Tally Ho + Rabby (Nothing works, issue likely on Tally Ho's side - maybe on Rabby's side)
• MetaMask + Rabby + Pocket Universe (When switched to MM, no popups, when switched to Rabby, throws error when using sendAsync, issue likely on PU's side)
• MetaMask + Tally Ho + Pocket Universe (Nothing works, issue likely on PU's side)
• MetaMask + Coinbase Wallet + Pocket Universe (When connected to MM, PU pops up twice, issue on PU's side)

[rkalis]

The earlier issues with MM + Rabby have been resolved by Rabby. I updated the OP to document some other borked combinations as well as documentation of which combinations have been tested to work.