Is your feature request related to a problem? Please describe.
There's a really cool feature in the app allowing you to "simulate" any address, but if you don't know it you don't find it as you manually have to enter things in the console ( localstorage.setItem('mockWalletAddress', '0x0') ).

Describe the solution you'd like
A input somewhere where i can enter & also remove the mock address.

• Allow setting watched wallet address from UI
• Handling for invalid or blank address
• Remove "Switch Network" error from modals while in watch wallet mode
• Block tx buttons, display warnings, and add ability to copy tx data
• Adding Switch Wallet button for UX improvement