Fixes to emailing cancel requests. Changes to email jobs with no site_id

app/Mail/InvoiceEmail.php

@@ -6,6 +6,7 @@ use Illuminate\Bus\Queueable;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Mail\Mailable;
 use Illuminate\Queue\SerializesModels;
+use Illuminate\Support\Facades\Config;
 
 use App\Models\Invoice;
 
@@ -32,6 +33,8 @@ class InvoiceEmail extends Mailable
 	 */
 	public function build()
 	{
+		Config::set('site',$this->invoice->site);
+
 		return $this
 			->markdown('email.user.invoice')
 			->subject(sprintf( 'Invoice: %s - Total: $%s - Due: %s',