Administration: Increase the width of the application password input field.

This changeset ensures application password is fully shown in the related input field, after the UI changes shipped in 7.0.

Follow-up to [61645].

Props johnbillion, nimeshatxecurify, jsmansart, amin7, huzaifaalmesbah, abdullah17.
Fixes #64738.



git-svn-id: https://develop.svn.wordpress.org/trunk@62043 602fd350-edb4-49c9-b593-d223f7449a82