FIX: react again on hyperlink clicks in help and scenario texts

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7059 8aca7d54-2c30-db11-9de9-000461428c89
Autoselect posbuttons when on pos

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7060 8aca7d54-2c30-db11-9de9-000461428c89