ChannelActionsPlugin#ChannelActionsPlugin responsible for the [view] menu should also show the view menu when there is only a live variant

For some reason the original writer of the code thought that only when there is a preview of a document that it can be previewed in the channel mngr. This however isnt true. Hence, the if check in the code below can just be removed

if (Boolean.TRUE.equals(workflow.hints().get("previewAvailable"))) {
        addMenuDescription(model);
 }