only update file browser and dir selection box when on top-level (bug #44622) * main-window.cc (change_directory_callback): call function for updating gui * octave-qt-link.cc (octave_qt_link): init new variables _current_directory and _new_dir; (do_change_directory): only store current dir and new state, no gui update; (update_directory): new function updating gui and clearing new dir state; (do_set_workspace): when on top level and new dir state, update gui * octave-qt-link.h: new update function, new variables for dir and state

((nil .
      ((c-file-style . "gnu")
       (indent-tabs-mode . nil)
       (fill-column . 72)
       (eval . (when (and (buffer-file-name)
                          (string-match-p "\\.h\\'" (buffer-file-name))
                          (not (string-match-p "/gnulib/" (buffer-file-name))))
                 (c++-mode)
                 (c-set-style "gnu")))))
 (change-log-mode . ((indent-tabs-mode . t)))
 (makefile-mode . ((indent-tabs-mode . t))))