[Request] Consider mailto and tel links in the Notification subcopy $actionUrl label

[hofmannsven]

Description:

The default Notification email template does not take care of mailto: and tel: links in the subcopy slot. The $actionUrl label is not readable and it is not possible to copy and paste the link from the email.

Steps to reproduce:

1. Create a new Notification:

php artisan make:notification InvoicePaid

2. Add an email address (or phone number) as action URL in App\Notifications\InvoicePaid:

public function toMail($notifiable)
{
    return (new MailMessage)
                ->line('The introduction to the notification.')
                ->action('Notification Action', 'mailto:test@example.com')
                ->line('Thank you for using our application!');
}

3. Trigger the Notification:

$user->notify(new App\Notifications\InvoicePaid());

The (default) text in the subcopy of the email now reads as:

If you’re having trouble clicking the "Notification Action" button, copy and paste the URL below
into your web browser: mailto:test@example.com

Request:

Consider stripping mailto: and tel: from the subcopy $actionUrl label.