Feature Request: Playground, Allow custom "from" EOA address

[salparadi]

The contract I am testing has some ownership tests. It would be helpful to have an additional (optional, hidden) field to enter the address that the call would be sent from. Currently it just defaults to an evm.codes dummy address, meaning I need to alter my contract's owner to test. Would be super helpful to allow a "impersonation" so I can use my actual EOA address to satisfy the ownership checks. Thanks. Amazing tool, wouldn't have gotten far with Huff without it!