sourcePaths no longer work after #354

[puremourning]

I submitted a detailed review on #354

Essentially it seems that user-specified sourcePaths are no longer used when resolving the filesystem path for a file in the stack trace after the above patch. The result is that we always return jdt:// paths which not all clients know how to handle.

It seems to me that we should always prefer filesystem paths (having applied user sourcePaths) over "internal" jdt:// paths.

[puremourning]

One solution might be an option to ask the server to never return a .class file jdt:// path and always return from the sourcePaths or "unknown"