WB-448 handling of files with same names but different directories: This was...

WB-448 handling of files with same names but different directories: This was never implemented correctly as it was treating all files in overlay as if they had the same name.  As  a result, if any files were in different directories, the relative paths were displayed.  This has been corrected so that uniquely named files have no path displayed, and files with same name but different paths show a relative path.