#17764: Core Shapes can't be overriden

Work Items: 17764

--HG--
branch : 1.x

src/Orchard/DisplayManagement/Descriptors/DefaultShapeTableManager.cs

@@ -45,7 +45,7 @@ namespace Orchard.DisplayManagement.Descriptors {
                         (descriptor, alteration) => {
                             alteration.Alter(descriptor);
                             return descriptor;
-                        }));
+                        })).ToList();
 
                 return new ShapeTable {
                     Descriptors = descriptors.ToDictionary(sd => sd.ShapeType, StringComparer.OrdinalIgnoreCase),

src/Orchard/DisplayManagement/Descriptors/ShapeAlterationBuilder.cs

@@ -55,6 +55,8 @@ namespace Orchard.DisplayManagement.Descriptors {
                         return target(displayContext);
                     }
                 };
+
+                // ShapeDescriptor.Bindings is a case insensitive dictionary
                 descriptor.Bindings[_bindingName] = binding;
 
             });

src/Orchard/DisplayManagement/Descriptors/ShapeDescriptor.cs

@@ -12,7 +12,7 @@ namespace Orchard.DisplayManagement.Descriptors {
             Displaying = Enumerable.Empty<Action<ShapeDisplayingContext>>();
             Displayed = Enumerable.Empty<Action<ShapeDisplayedContext>>();
             Wrappers = new List<string>();
-            Bindings = new Dictionary<string, ShapeBinding>();
+            Bindings = new Dictionary<string, ShapeBinding>(StringComparer.OrdinalIgnoreCase);
             Placement = ctx => new PlacementInfo {Location = DefaultPlacement};
         }