This window is displayed within the content pane area and will include views used within a specific list. Similar to content, users will be able to select one or more of these objects and copy them from one place to another.
Hidden Lists
To expose hidden lists (e.g. the Master Page Gallery) in the Navigator Pane, right click on the "Lists" node and choose the "Hidden Lists" option. After this is enabled, you will see the hidden lists for this location.