- update padding information dynamically depending on diagram type   (sequence diagrams has no arrow decorating messages)
- update padding information dynamically depending on diagram type
  (sequence diagrams has no arrow decorating messages)


git-svn-id: 80d932a80928324f4d3d71af042e652e41ead033@2063 a8418922-720d-0410-834f-a69b97ada669

amolenaar/gaphor,amolenaar/gaphor