code tidy - wayobj diagonals

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6829 8aca7d54-2c30-db11-9de9-000461428c89
Comitted the undisputed parts of the theme patch including a renovated scrollbar to have smaller patches left

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6830 8aca7d54-2c30-db11-9de9-000461428c89
overlook three patch_max

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6831 8aca7d54-2c30-db11-9de9-000461428c89
overlook three patch_max

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6832 8aca7d54-2c30-db11-9de9-000461428c89