Browser Extensions: Quick view/copy reverse-aliases for any "existing alias"

[argarner]

In the FIrefox extension, you can't view/copy reverse-aliases for existing aliases. These are currently displayed, and copied on click, in the web app when clicking the "send email" button for any alias (route https://app.simplelogin.io/dashboard/alias_contact_manager/1234.../); it'd make sense for the browser extension to do the same.