FIX: (Timothy) RGB 555 works again

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7242 8aca7d54-2c30-db11-9de9-000461428c89
FIX: (Timothy) always send complete data on announce

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7243 8aca7d54-2c30-db11-9de9-000461428c89
FIX: (An_dz) skinnable toolbars

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7244 8aca7d54-2c30-db11-9de9-000461428c89
FIX: (An_dz) skinnable toolbars

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7245 8aca7d54-2c30-db11-9de9-000461428c89