fix 11772 Metadata in post doesn't set default

docs/changelog/7.x.x.txt

@@ -11,6 +11,7 @@
  - fixed #11770: Starter needs to set all account plugins
  - fixed #11771: Default Newsletter template not set
  - fixed #11432: DataTable date input
+ - fixed #11772: Metadata in Post doesn't set default value correctly
 
 7.9.10
  - fixed #11721: spamStopWords not in WebGUI.conf.original

lib/WebGUI/Asset/Post.pm

@@ -1773,6 +1773,7 @@ sub www_edit {
                 name      => "metadata_".$meta->{$field}{fieldId},
                 uiLevel   => 5,
                 value     => $meta->{$field}{value},
+                defaultValue => $meta->{$field}{defaultValue},
                 extras    => qq/title="$meta->{$field}{description}"/,
                 options   => $options,
                 fieldType => $fieldType,