New Statistics Page!

Added a statistics page so that you have another way of seeing what's taking up all of your space.
The statistics page has:

• A list of the largest files.
• A list of the largest folders.
• A list of all file types, sorted by how much space each file type takes up on your system.

You can get to the statistics page by clicking on the Mode selector at the top of the screen.

File List

Replaced file list on the right with a tree-like view of the files.