split main_window::construct for clarity * main-window.h, main-window.cc (_new_script_action, _open_action, _cut_action, _copy_action, _paste_action, _undo_action, _redo_action): New data members. (construct_octave_qt_link, construct_menu_bar, construct_file_menu, construct_new_menu, construct_edit_menu, construct_debug_menu_item, construct_debug_menu_item, construct_debug_menu, construct_desktop_menu, construct_window_menu_item, construct_window_menu, construct_help_menu, construct_documentation_menu, construct_tool_bar): New functions. (main_window::construct): Use them.