improve error messages

Author: pxpm

src/app/Library/CrudPanel/Traits/FieldsProtectedMethods.php

@@ -259,12 +259,12 @@ protected function makeSureSubfieldsHaveNecessaryAttributes($field)
         }
 
         if(! is_multidimensional_array($field['subfields'], true)) {
-            abort(500, 'Subfields of «'.$field['name'].'» are malformed. Make sure you provide an array of subfields');
+            abort(500, 'Subfields of «'.$field['name'].'» are malformed. Make sure you provide an array of subfields.');
         }
 
         foreach ($field['subfields'] as $key => $subfield) {
             if (empty($subfield) || ! isset($subfield['name'])) {
-                abort(500, 'Subfield name can\'t be empty');
+                abort(500, 'A subfield of «'.$field['name'].'» is malformed. Subfield attribute name can\'t be empty.');
             }
 
             // make sure the field definition is an array