Listen to read-only entity state changes so we can refresh if the read-only state changes on one of our selected entities.

Signed-off-by: Chris Galvan <chgalvan@amazon.com>

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/EntityPropertyEditor.cpp

@@ -569,6 +569,12 @@ namespace AzToolsFramework
         AZ::EntitySystemBus::Handler::BusConnect();
         EntityPropertyEditorRequestBus::Handler::BusConnect();
         EditorWindowUIRequestBus::Handler::BusConnect();
+
+        AzFramework::EntityContextId editorEntityContextId = AzFramework::EntityContextId::CreateNull();
+        EditorEntityContextRequestBus::BroadcastResult(
+            editorEntityContextId, &EditorEntityContextRequests::GetEditorEntityContextId);
+        ReadOnlyEntityPublicNotificationBus::Handler::BusConnect(editorEntityContextId);
+
         m_spacer = nullptr;
 
         m_emptyIcon = QIcon();
@@ -618,6 +624,7 @@ namespace AzToolsFramework
     {
         qApp->removeEventFilter(this);
 
+        ReadOnlyEntityPublicNotificationBus::Handler::BusDisconnect();
         EditorWindowUIRequestBus::Handler::BusDisconnect();
         EntityPropertyEditorRequestBus::Handler::BusDisconnect();
         ToolsApplicationEvents::Bus::Handler::BusDisconnect();
@@ -5762,6 +5769,14 @@ namespace AzToolsFramework
         SaveComponentEditorState();
     }
 
+    void EntityPropertyEditor::OnReadOnlyEntityStatusChanged(const AZ::EntityId& entityId, [[maybe_unused]] bool readOnly)
+    {
+        if (IsEntitySelected(entityId))
+        {
+            UpdateContents();
+        }
+    }
+
     void EntityPropertyEditor::OnEditorModeActivated(
         [[maybe_unused]] const AzToolsFramework::ViewportEditorModesInterface& editorModeState, AzToolsFramework::ViewportEditorMode mode)
     {

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/EntityPropertyEditor.hxx

@@ -29,6 +29,7 @@
 #include <AzToolsFramework/API/ViewportEditorModeTrackerNotificationBus.h>
 #include <AzToolsFramework/ComponentMode/EditorComponentModeBus.h>
 #include <AzToolsFramework/Entity/EditorEntityContextBus.h>
+#include <AzToolsFramework/Entity/ReadOnly/ReadOnlyEntityBus.h>
 #include <AzToolsFramework/ToolsComponents/ComponentMimeData.h>
 #include <AzToolsFramework/ToolsComponents/EditorInspectorComponentBus.h>
 #include <AzQtComponents/Components/O3DEStylesheet.h>
@@ -117,6 +118,7 @@ namespace AzToolsFramework
         , public AZ::EntitySystemBus::Handler
         , public AZ::TickBus::Handler
         , private EditorWindowUIRequestBus::Handler
+        , private ReadOnlyEntityPublicNotificationBus::Handler
     {
         Q_OBJECT;
     public:
@@ -254,6 +256,9 @@ namespace AzToolsFramework
         // EditorWindowRequestBus overrides
         void SetEditorUiEnabled(bool enable) override;
 
+        // ReadOnlyEntityPublicNotificationBus overrides ...
+        void OnReadOnlyEntityStatusChanged(const AZ::EntityId& entityId, bool readOnly) override;
+
         bool IsEntitySelected(const AZ::EntityId& id) const;
         bool IsSingleEntitySelected(const AZ::EntityId& id) const;