Service Fabric explorer is allowing creating an Actor Service as Singleton Partition

[leonardovillar]

We were able to reproduce a scenario where we were able to deploy an Actor Service as a singleton partition even that is not supported.
From Visual Studio if we try to change the Actor partition schema to singleton, VS will automatically undo the change and set it back as Int64, However if we have already deployed the whole application and then go to SFX, Application, then scroll down to ServiceType, find the Actor service and then click on "Create" The Create Service wizard will have "Singleton" partition schema marked by default under "Show Advanced Options"

This does allow us to create the Actor as Singleton and that may cause issues when trying to interact with the Actor such as ""Unable to cast object of type 'System.Fabric.SingletonPartitionInformation' to type 'System.Fabric.Int64RangePartitionInformation'."

When creating an actor from SFX the create service wizard should be defaulting to Int64Range and all the other options should be disabled when it's a n ActorServiceType