Shop exception classes were not subclasses of WebGUI::Error.

docs/changelog/7.x.x.txt

@@ -12,6 +12,7 @@
  - fixed #10518: ThingyRecord edit page - Fields to Edit not filled in
  - fixed #10603: ThingyRecord Thank You/Confirmation Screen Confusing
  - fixed #10615: i18n Asset_StoryArchive - deleteIcon
+ - fixed: Exceptions from WebGUI::Exception::Shop
 
 7.7.13
  - fixed #10574: Creating Calendar Entry

lib/WebGUI/Exception/Shop.pm

@@ -19,11 +19,13 @@ use WebGUI::Exception;
 use Exception::Class (
 
     'WebGUI::Error::Shop::MaxOfItemInCartReached' => {
-        description     => "Some items restrict how many you can put into your cart.",
+        description  => "Some items restrict how many you can put into your cart.",
+        isa          => 'WebGUI::Error',
     },
 
     'WebGUI::Error::Shop::RemoteShippingRate' => {
-        description     => "Errors during the remote rate lookups.",
+        description  => "Errors during the remote rate lookups.",
+        isa          => 'WebGUI::Error',
     },
 
 );