LTR direction for username, email, password and URL fields

[sabernhardt]

Sets all password type inputs to LTR direction and adds the .ltr class to forms.css for use in the login page. Several fields need the ltr class or another method of setting the direction.

Site fields in Arabic

Login pages: username and password

Common login at wp-login.php, with the password visibility button on the right (as recommended by ierwira)

Reset Password

Custom login form using wp_login_form() in Twenty Sixteen (this adds the direction style inline, but I do not expect anyone would want to override that)

Comments: email field

Switching the type from text to email would solve the direction, but I used the .code class instead to match the styling of the URL field. (These could have both the email type and the class, too.)

Edit Comment

Quick Edit on Comments screen

Post password

Quick Edit on Posts screen

Post metabox (in Classic Editor)

Media: URL fields

Edit from Media Gallery (list mode)

Edit from Media Gallery (grid mode)

Insert an image into a post (I used Classic Editor)

User Profile: username, password and application password

Navigate to your profile page (/wp-admin/profile.php) or edit another user's profile (/wp-admin/user-edit.php).

Editing another user is very similar.

New User: username and password

Network (multisite) fields, in Persian

Activation page: activation key

Set language in Network Settings, and navigate to /wp-activate.php.

Registration page: username and email

Set language in main site's Settings, and make sure the network allows both site and user registrations. Then navigate to /wp-signup.php.

User signup (not logged in, step 1)

Network Site Info: Site Address (URL)

Navigate to /wp-admin/network/sites.php (if using a mouse, you could hover over the first link under My Sites dropdown, and then click the second link in the sub-menu). Open individual sites, and the first tab will be Info.

The main site has a code element to fix the direction.

Other sites use the url type for their input fields.

Network Site Users: username and email

Navigate to the second tab for each Site (main: /wp-admin/network/site-users.php?id=1), and scroll down to the Add New User form.

Network Site Settings: several options are URLs, usernames or emails

Navigate to the fourth tab for each Site (main: /wp-admin/network/site-settings.php?id=1).

This patch adds the ltr class to multiple option fields (siteurl, home, admin_email, new_admin_email, mailserver_url, mailserver_login, mailserver_pass, ping_sites, permalink_structure, category_base, tag_base, upload_path, upload_url_path).

Main site:

...

...

...

(The upload path options were empty.)

Second site:

Trac ticket: https://core.trac.wordpress.org/ticket/54915

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[sabernhardt]

The Install and setup-config.php pages already set LTR direction on their fields (by ID selectors).

The Repeat Password fields on the profile screens, which appear when JavaScript is inactive, would not need the special class because they remain password type.