Custom transformer navigation

When working with workspaces with large numbers of embedded custom transformers it can become difficult to navigate between them. The tabs at the top of the screen become too small to read the transformer names and there is no easy way to go back and forth between views. A web browser style "back" button would be very handy, for example, if navigating in to edit a custom transformer that is embedded in another transformer, then needing to go back to where you came from.