clearify customer add/edit name/company requirements

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

lng/de.lng.php

@@ -546,6 +546,7 @@ return [
 		'name' => 'Name',
 		'firstname' => 'Vorname',
 		'company' => 'Firma',
+		'nameorcompany_desc' => 'Entweder Vorname/Name oder Firma ist erforderlich',
 		'street' => 'Straße',
 		'zipcode' => 'PLZ',
 		'city' => 'Ort',

lng/en.lng.php

@@ -589,6 +589,7 @@ return [
 		'name' => 'Name',
 		'firstname' => 'First name',
 		'company' => 'Company',
+		'nameorcompany_desc' => 'Either firstname/name or company is required',
 		'street' => 'Street',
 		'zipcode' => 'Zipcode',
 		'city' => 'City',