add some qscintilla actions to the menu and to the shortcut manager * file-editor.cc (request_delete_start_word, request_delete_end_word, request_delete_start_line, request_delete_end_line, request_delete_line, request_copy_line, request_cut_line, request_dupllicate_delection, request_transpose_line, request_upper_case, request_lower_case): new slots for the added actions; (construct): added submenus "Commands" and "Format" witht the new actions to the edit menu; (set_shortcuts): settings shortcuts for the new actions; (check_actions): enabling actions depending on existence of editor tabs; * file-editor.h: new slots, menus and actions * file-editor-tab.cc (scintilla_command): new slot for signals from file_editor indicating scintilla commands * file-editor-tab.h: new slot scintilla_command * octave_qscintilla (constructor): disabling shortcuts for actions handled by the gui editor; (get_global_textcursor_pos): remove unecessary namespace specification * shortcut-manager.cc (constructor): store settings objects in class variable; (do_init_data): initialization of new actions; (init, do_write_shortcuts, do_set_shortcut): code cleanup accessing settings; (shortcut_dialog_finished) fix writing to wring column of tree view * shortcut-manager.h: settings stored as class variable