Single-Wordpress-Installation - function bp_core_email_from_address_filter() not working

[21cdb]

On line 1592 of bp-core.php the function

function bp_core_email_from_address_filter() {
	global $current_site;
	return 'noreply@' . $current_site->domain;
}
add_filter( 'wp_mail_from', 'bp_core_email_from_address_filter' );

doesn't work. I guess it's due to the use of $current_site which isn't available in Single-WP.

Also make 'noreply@' translatable if possible.

[apeatling]

(In [2315]) Fixes #1545 - incorrect email domain on notification emails.