Fix the multiple table of content bug

Created by: anaqreon

Like I said on Hubzilla:

This loads the translated TOC if present, loading the default English version if not, but it breaks hierarchical TOC loading for subfolders. Almost no one contributes to the doco in any meaningful way, and there are no "toc" files present in any of the subfolders currently. I would like to move forward with my proposed changes and worry about the hierarchical TOC files later if someone has a practical need for them. In the meantime just having one table of contents is challenging enough.