Browse

The idea is to create a graceful way of perusing the file hierarchy and
a way of viewing the spreadsheet, for users who are used to the current web layout (kind of a "legacy" thing). As I see it, this would be phased out in time.

Browse gives you a dropdown:

Sources
Composers
TABs
Spreadsheet

Spreadsheet puts you in the spreadsheet (assuming you have Excel,
OpenOffice, LibreOffice or something else that can read it -- is there
something we can do to check this?).

Clicking on any of the other options puts you in the file system,
hopefully in a more graceful way than just clicking on a link would do.