ADD: second_open_closes_win =1 in simuconf.tab will close open window instead top them on secod call/click
ADD: remember_window_positions=1 (default) will remeber last window positions


git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6524 8aca7d54-2c30-db11-9de9-000461428c89