message: Sort filenames before adding them to the ListBox
diff: #include <string>
  #include <vector>
  +#include <algorithm>
  using namespace NAS2D;
  @@ -101,9 +102,9 @@ void FileIo::scanDirectory(const std::string& directory)
  {
  Filesystem& f = Utility<Filesystem>::get();
  std::vector<std::string> dirList = f.directoryList(directory);
  + std::sort(dirList.begin(), dirList.end());
  mListBox.clear();
  -
  for (auto& dir : dirList)
  {
  if (!f.isDirectory(directory + dir))
  @@ -113,7 +114,6 @@ void FileIo::scanDirectory(const std::string& directory)
  mListBox.add(dir);
  }
  }
  - mListBox.sort();
  }
  