Refresh delegate painting in the Outliner even if the widget is not in focus.

Signed-off-by: Danilo Aimini <82231674+AMZN-daimini@users.noreply.github.com>

Code/Framework/AzToolsFramework/AzToolsFramework/FocusMode/FocusModeNotificationBus.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/Component/EntityId.h>
+#include <AzCore/EBus/EBus.h>
+
+namespace AzToolsFramework
+{
+    class FocusModeNotifications
+        : public AZ::EBusTraits
+    {
+    public:
+        virtual ~FocusModeNotifications() = default;
+
+        virtual void OnEditorFocusChanged(AZ::EntityId entityId) = 0;
+    };
+
+    using FocusModeNotificationBus = AZ::EBus<FocusModeNotifications>;
+
+} // namespace AzToolsFramework

Code/Framework/AzToolsFramework/AzToolsFramework/FocusMode/FocusModeSystemComponent.cpp

@@ -9,6 +9,7 @@
 #include <AzCore/Component/TransformBus.h>
 
 #include <AzToolsFramework/API/ViewportEditorModeTrackerInterface.h>
+#include <AzToolsFramework/FocusMode/FocusModeNotificationBus.h>
 #include <AzToolsFramework/FocusMode/FocusModeSystemComponent.h>
 
 namespace AzToolsFramework
@@ -64,7 +65,13 @@ namespace AzToolsFramework
 
     void FocusModeSystemComponent::SetFocusRoot(AZ::EntityId entityId)
     {
+        if (m_focusRoot == entityId)
+        {
+            return;
+        }
+
         m_focusRoot = entityId;
+        FocusModeNotificationBus::Broadcast(&FocusModeNotifications::OnEditorFocusChanged, m_focusRoot);
 
         // TODO - If m_focusRoot != AZ::EntityId(), activate focus mode via ViewportEditorModeTrackerInterface; else, deactivate focus mode
     }