allow welcome wizard dialog to be canceled * resource-manager.h, resource-manager.cc (class resource_manager): Cache settings directory and file, but not first_run. (resource_manager::get_gui_translation_dir, resource_manager::do_update_network_settings): Only access settings if it is valid. (resource_manager::do_reload_settings): Don't set first_run. (resource_manager::do_get_home_path): Delete. * welcome-wizard.cc (welcome_wizard::welcome_wizard): Provide cancel button. * octave-gui.cc (octave_start_gui): Don't loop over welcome wizard. Run welcome wizard once if settings file is missing and exit Octave if welcome wizard returns a rejected status. Otherwise, load resources and start Octave.

gnulib-hg = gnulib-hg