Allow disabling text transforms in UI

Graph Explorer has a useful feature that will:

* Allow the user to rename a label/type for vertices and edges
* Substitute in short prefixes in long RDF URIs

This improves the readability of Graph Explorer and reduces clutter in the UI. However, it is sometimes useful to see the actual values from the database rather than the shortened version.

We should add a toggle of some kind to the UI to disable the text transforms.

Start by locating the Graph Explorer UI code that applies vertex and edge label renaming and RDF URI prefix substitution. Trace how those transformed values reach the display components, then add a user-facing toggle whose disabled state shows the original database values; done means both transformations can be turned off in the UI.

Written by the indexing model from the issue text.