tree structure viewer NEEDED

Just uploaded my codebase to Textastic to see how it navigates the files. It looks like a tree view of the complete structure of files in sub folders is missing. My codebase is structured into several folder levels so it is a pain to have to poke through it all with the limited file browser Textastic comes with. A nice file tree with folding and flattening is needed to keep sane while using Textastic!