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