Adds mention of label and description in ucOrderProperty meta

Author: skttl

16/umbraco-commerce/key-concepts/ui-extensions/order-properties.md

@@ -30,6 +30,8 @@ A `meta` entry provides configuration options for the property
 
 | Name | Description |  
 | -- | -- |
+| `label` | A fallback label for the property, if there is no localization available. If empty, or undefined, it will display the default localization fallback. |
+| `description` |  A fallback label for the property description, if there is no localization available. If empty, or undefined, it will display the default localization fallback. |
 | `propertyAlias` | The alias of the order line property to edit |
 | `group` | Defines a [group](#order-property-groups) in which to display the property |
 | `editorUiAlias` | The alias of the property editor to use to edit this property |
@@ -59,4 +61,4 @@ Umbraco Commerce will automatically look for the following entries:
 | `ucProperties_{alias}Label` | A main label for the property |
 | `ucProperties_{alias}Description` | A description for the property |
 
-Here `{alias}` is the property alias of a property.
+Here `{alias}` is the property alias of a property.