- Dev-Editor now checks if it is able to access a directory: Directories that

- Dev-Editor now checks if it is able to access a directory: Directories that
  are not accessible are greyed in directory listing. Accessing such a directory
  causes an error message.
- Dev-Editor checks if it has read access to the virtual root directory. Having
  no access to this directory would cause Dev-Editor to show the contents of the
  real root directory!