Introducing smart_scrolling.py


git-svn-id: svn+ssh://svn.code.sf.net/p/mcomix/code@919 ef8490bc-f317-4725-81ed-e95a9aca1bcf
No longer accept all modifiers for key that is registered without any.

git-svn-id: svn+ssh://svn.code.sf.net/p/mcomix/code@920 ef8490bc-f317-4725-81ed-e95a9aca1bcf