Merge branch 'bugfix/derived-topic-validation' into develop

Fixes a bug in which topics that derive from another topic still enforced required field validation, thus preventing required fields from effectively inheriting their values from the derived topic. This fix includes a simple conditional jQuery script which removed any jQuery Validator `rules()` as well as any HTML5 `required` attributes from `input`, `select`, and `textarea` fields. Other validators and validation attributes are left intact.

The `Key` (_Folder Name_) field will also retain its `required` attribute, since the `Key` attribute should always be defined. (Technically, we could inherit this value as well, but that's not currently implemented. As is, however, when a derived topic is set via the OnTopic Editor, the `Key` field will default to the derived topic's `Key` if a value for it hasn't already been set.)

Author: JeremyCaney

OnTopic.Editor.AspNetCore/Areas/Editor/Views/Editor/Edit.cshtml

@@ -108,6 +108,18 @@
         }
       });
 
+      @if (Model.Topic.DerivedTopic != null) {
+        <text>
+          /**
+           * Disable required fields if derived topic, as missing values will be inherited
+           */
+          $('section input, section textarea, section select')
+            .not("section.Key input")
+            .removeAttr('required')
+            .rules('remove', 'required');
+        </text>
+      }
+
     });
 
   </script>