Unvisited and visited files
Similar to unvisited lines, you can also browse all files that have not been visited, or those that have.
Query menu 
choose Find unvisited files... displays the Unvisited Files dialog
The dialog displays a list of files.
In this colour scheme all files will be shown in pink since they are all completely unvisited.
There are no hierarchical views to expand, and double clicking does not open the file in an editor.
•Refresh updates the list
•Unvisited Files files that have not been visited
•Visited Files displays files that have been visited, even if only partially
All files listed would then be shown in green or whatever colour you set:
