Merge branch '4050_cleanup'

Merge branch '4050_cleanup'

* 4050_cleanup: (27 commits)
  Update po/*.po files.
  src/editor/editdraw.c: refactoring.
  src/editor/editdraw.c: fix coding style.
  (get_key_code): yet another refactoring.
  (get_key_code): minor refactoring.
  (get_key_code): fix coding style.
  Skins: unify panel-related item names.
  Skins: move items from [widget-common] section to [widget-panel] one.
  (mc_skin_lines_load_frm): cleanup, fix coding style.
  src/filemanager/dir.c: fix coding style.
  Sync with gnulib 4d4a22ab1f719b7c6c3fe3dbf45d11baafd3c563.
  Sync with gnulib 7a15069b68a376f26c5dca34ae2689c5bf8adc99.
  lib/vfs/parse_ls_vga.c: refactoring.
  lib/vfs/parse_ls_vga.c: fix coding style.
  lib/vfs/parse_ls_vga.c: use gboolean instead of int for boolean values.
  Ticket #4068: fix preprocessor tests.
  doc/NEWS: cosmetics.
  Ticket #3355: mc-wrapper: don't cd to the same directory.
  src/textconf.c: use puts() to print simple strings.
  (show_version): show library versions.
  ...