* Add missing text domains to password meta box output.
* Correct phpdoc for Sessions meta box.
* Make $user_id global, and set it when adding meta-boxes.
* Add new files for Application Passwords.
* Register Application Passwords meta box and bump versions.
* Only enqueue/override Application Passwords JS if available for user.
* Add Help text for Application Passwords.
* Shorten strings, and make clicking on the password copy it to the clipboard.