simplified some dired functions fixed navigation bugs:  - current file stays current on sort, dired, parent  - default entry is first upon navigating to a subdirectory
simplified some dired functions
fixed navigation bugs:
 - current file stays current on sort, dired, parent
 - default entry is first upon navigating to a subdirectory

dgdunix/qemacs-tmp,dgdunix/qemacs-tmp,dgdunix/qemacs-tmp