code style fixes

git-svn-id: file:///svn/Scribus/trunk/Scribus@19429 11d20701-8431-0410-a711-e3c959e3b870
avoid erroneous deletion of shape when editing nodes

git-svn-id: file:///svn/Scribus/trunk/Scribus@19430 11d20701-8431-0410-a711-e3c959e3b870