adapt more code to latest UndoTransaction api changes

git-svn-id: file:///svn/Scribus/trunk/Scribus@19421 11d20701-8431-0410-a711-e3c959e3b870
last part of adaptations to latest UndoTransaction api changes

git-svn-id: file:///svn/Scribus/trunk/Scribus@19422 11d20701-8431-0410-a711-e3c959e3b870