Changed: context menu of tabs uses the items of menu "Window" (PMDI).

Added: support for clipboard containing NULL symbol (between AkelEdit windows).

Fixed: command line processing and working directory.
Fixed: saving in UTF32-LE and UTF32-BE codepages.
Fixed: program may hang when switching between tabs that use word wrap (MDI).
Fixed: access order of tabs (MDI/PMDI).
Fixed: when printing a range of pages, only first page printed.
Fixed: hotkey F12 for showing codepages menu didn't work.
Fixed: insert space, tab into the empty vertical selection.