Application Passwords: Ensure the password field displays correctly on small screens.

This changeset improves the responsiveness of the Application password input field.

Follow-up to [62043].

Props ekla, audrasjb, nimeshatxecurify.
Fixes #64880.



git-svn-id: https://develop.svn.wordpress.org/trunk@62057 602fd350-edb4-49c9-b593-d223f7449a82