This is the Recent File Stock of the Sidebar

Stock

The stock is intended to show the latest of a mix of online and local files in most recently used order.

Each file listed in the stock has a single click accessible popout that gives a few more details about the file and allows for opening it up with the various applications that are registered for it. Double clicking on the file will directly open it up with the default application. I gave a 48px width for each icon in the stock popout, however I gave a different width for each icon in the browser; we'll need to define a normal width for both where icons look decent and are centered in.

Browser

The browser is intended to allow a person to easily search and retrieve files they had recently used.

Here's an example of the layout of the file browser using the standard sidebar browser system.

Same browser in a search mode. Still working on the alt-search placement...