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This has been renamed to "New View into File" in 2181, but I too found myself searching for it under the View menu - I definitely did not expect to find this option under the File menu.
IntelliJ does this too, and it's very useful in a team environment. It has three simple, well chosen settings for "Strip trailing spaces on save":
  1. Modified Lines
  2. All
  3. None
Some more observations:

* On Windows, I've reproduced this issue with x32 and x64 builds, with folder hierarchies on both NFS and local disk.
* On Linux, I can get folder contents to show up by expanding the folder, then hitting "Project->Refresh Folders", one level at a time. This doesn't seem to work on Windows.

On closer analysis, it looks like the depth limitation is not 6 across my entire tree - some folders go deeper than others. It's as if the folder view does a traversal of the tree asynchronously in the background, but gives up or times out after some period of time (maybe a few minutes?), leaving the unexplored parts of the tree invisible.