fix image file names

Author: Jak-MS

articles/service-fabric/media/service-fabric-visualizing-your-cluster/SfxApplicationTree.png renamed to articles/service-fabric/media/service-fabric-visualizing-your-cluster/sfx-application-tree.png

@@ -130,11 +130,11 @@ Image store viewer is a feature offered if using Native Image Store that allows
 * [Service Fabric application deployment using PowerShell](service-fabric-deploy-remove-applications.md)
 
 <!--Image references-->
-[sfx-cluster-dashboard]: ./media/service-fabric-visualizing-your-cluster/SfxClusterDashboard.png
-[sfx-cluster-map]: ./media/service-fabric-visualizing-your-cluster/SfxClusterMap.png
-[sfx-application-tree]: ./media/service-fabric-visualizing-your-cluster/SfxApplicationTree.png
-[sfx-service-essentials]: ./media/service-fabric-visualizing-your-cluster/SfxServiceEssentials.png
-[sfx-delete-application]: ./media/service-fabric-visualizing-your-cluster/SfxDeleteApplication.png
-[sfx-create-app-instance]: ./media/service-fabric-visualizing-your-cluster/SfxCreateAppInstance.png
+[sfx-cluster-dashboard]: ./media/service-fabric-visualizing-your-cluster/sfx-cluster-dashboard.png
+[sfx-cluster-map]: ./media/service-fabric-visualizing-your-cluster/sfx-cluster-map.png
+[sfx-application-tree]: ./media/service-fabric-visualizing-your-cluster/sfx-application-tree.png
+[sfx-service-essentials]: ./media/service-fabric-visualizing-your-cluster/sfx-service-essentials.png
+[sfx-delete-application]: ./media/service-fabric-visualizing-your-cluster/sfx-delete-application.png
+[sfx-create-app-instance]: ./media/service-fabric-visualizing-your-cluster/sfx-create-app-instance.png
 [sfx-eventstore]: ./media/service-fabric-diagnostics-eventstore/eventstore.png
-[sfx-imagestore]: ./media/service-fabric-visualizing-your-cluster/SfxImageStore.png
+[sfx-imagestore]: ./media/service-fabric-visualizing-your-cluster/sfx-image-store.png