UX Workflow improvements for Physics Materials (#1237)

- Added button to PhysX Collider Component in PhysX Mesh's field to open FBX Settings.
- Added button Material Selection to open the physics material library in Asset Editor.
- Default Material in PhysX configuration is read only and consistent with the text in combo boxes.
- Material configuration field "Surface Type" renamed to "Name"
- Fixed bug in EditorColliderComponent where the material selection was not updated when changing the library.
- Fixed bug where the materials selection was not set to default when a physics material from the asset was not found in the library.
- Added attributes 'BrowseButtonEnabled' and 'BrowseButtonVisible' to PropertyAssetCtrl.
- Updated physx configuration setreg files of AutomatedTesting project.

Gems/PhysX/Code/Source/Pipeline/MeshAssetHandler.cpp

@@ -17,6 +17,7 @@
 #include <AzCore/IO/GenericStreams.h>
 #include <AzCore/IO/FileIO.h>
 #include <AzCore/Serialization/Utils.h>
+#include <AzCore/Serialization/EditContext.h>
 #include <PhysX/MeshAsset.h>
 #include <PhysX/SystemComponentBus.h>
 #include <Source/Pipeline/MeshAssetHandler.h>
@@ -158,6 +159,27 @@ namespace PhysX
             }
         }
 
+        void MeshAsset::Reflect(AZ::ReflectContext* context)
+        {
+            MeshAssetData::Reflect(context);
+
+            if (auto* serializeContext = azrtti_cast<AZ::SerializeContext*>(context))
+            {
+                serializeContext->Class<MeshAsset>()
+                    ->Field("MeshAssetData", &MeshAsset::m_assetData)
+                    ;
+
+                // Note: This class needs to have edit context reflection so PropertyAssetCtrl::OnEditButtonClicked
+                //       can open the asset with the preferred asset editor (FBX Settings).
+                if (auto* editContext = serializeContext->GetEditContext())
+                {
+                    editContext->Class<MeshAsset>("PhysX Mesh Asset", "")
+                        ->ClassElement(AZ::Edit::ClassElements::EditorData, "")
+                        ;
+                }
+            }
+        }
+
         void AssetColliderConfiguration::Reflect(AZ::ReflectContext* context)
         {
             if (AZ::SerializeContext* serializeContext = azrtti_cast<AZ::SerializeContext*>(context))