* Include `forms.css` and `l10n.css`, for consistency with login screen and other admin screens.
* Remove redundant `@import` directives from `login.css` for files already declared as dependencies.
* Adjust margin on password strength meter for consistency with other fields.
* Increase font size for "You will need this password to log in" notice.
* Fix misaligned icon on "Hide" button for the password.
Props iseulde, dan@micamedia.com, bassgang, cdog, johnbillion, nmenescardi, mukesh27, alpipego, SergeyBiryukov.
Merges [45673] to the 5.2 branch.
Fixes#35776, #43483, #47757, #47758.
Built from https://develop.svn.wordpress.org/branches/5.2@45844
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