Added support for a default view file if not other file is found

Author: mattbrailsford

src/Our.Umbraco.DocTypeGridEditor/Web/Extensions/HtmlHelperExtensions.cs

@@ -104,6 +104,12 @@ public static HtmlString RenderDocTypeGridEditorItem(this HtmlHelper helper,
                 {
                     return helper.Partial(fullPreviewViewPath, content);
                 }
+
+                fullPreviewViewPath = previewViewPath +  "Default.cshtml";
+                if (ViewEngines.Engines.ViewExists(helper.ViewContext, fullPreviewViewPath, true))
+                {
+                    return helper.Partial(fullPreviewViewPath, content);
+                }
             }
 
             // Check for view path view
@@ -120,6 +126,12 @@ public static HtmlString RenderDocTypeGridEditorItem(this HtmlHelper helper,
                 {
                     return helper.Partial(fullViewPath, content);
                 }
+
+                fullViewPath = viewPath + "Default.cshtml";
+                if (ViewEngines.Engines.ViewExists(helper.ViewContext, fullViewPath, true))
+                {
+                    return helper.Partial(fullViewPath, content);
+                }
             }
 
             // Resort to standard partial views