x11-wm/icewm: update IceWM to the latest version 3.4.0

- Now supports keybindings to shifted keys, literal Latin-1
  characters, and all UTF-8 code points
- Reparses the key bindings upon the keyboard layout change
- Fixed handling of a map request from an unmanaged client
- Several translation files missed in the previous releases
  had been added to the release tarball