No i18n in admin_created_user_subject()

[mrMagister]

./wp-admin/user-new.php
~line 33

	function admin_created_user_subject( $text ) {
		return "[" . get_bloginfo('name') . "] Your site invite";
	}

where is l10n function? :-)

The entire string should be translated, and the blogname sprintf'd into the larger string.

Added translatable function for the "Your site invite" string

Uploaded a sprintf'd version.

In [18249]:

Translate a missing string. props ldebrouwer, fixes #16861.

In [18250]:

Don't add extra spaces. props duck_, see #16861.