'Add to last closed file list.'

def add_last_closed_file(self, fname):

    if (fname in self.last_closed_files):
        self.last_closed_files.remove(fname)
    self.last_closed_files.insert(0, fname)
    if (len(self.last_closed_files) > 10):
        self.last_closed_files.pop((-1))
