Fix scr_rect and some other stuff

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6637 8aca7d54-2c30-db11-9de9-000461428c89
compile again

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6638 8aca7d54-2c30-db11-9de9-000461428c89
FIX: filter frame button positions, combobox element spacing

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6639 8aca7d54-2c30-db11-9de9-000461428c89