main: LocationType: add new property defaultFor in the admin

src/Bundle/ChillMainBundle/Form/LocationTypeType.php

@@ -71,6 +71,17 @@ final class LocationTypeType extends AbstractType
                     ],
                     'expanded' => true,
                 ]
-            );
+            )
+            ->add(
+                'defaultFor', 
+                ChoiceType::class,
+            [
+                'choices' => [
+                    'none' => null,
+                    'person' => LocationType::DEFAULT_FOR_PERSON,
+                    'thirdparty' => LocationType::DEFAULT_FOR_3PARTY,
+                ],
+                'expanded' => true
+            ]);
     }
 }