fix: allow transact iframe to copy to clipboard#19

sean-hill merged 2 commits intomasteratomicfi/atomic-transact-javascript:masterfrom

darrin/DD-2268-allow-transact-iframe-to-copy-to-clipboardatomicfi/atomic-transact-javascript:darrin/DD-2268-allow-transact-iframe-to-copy-to-clipboardCopy head branch name to clipboard