Enable ext-panning extension

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2337 eee81c28-f429-11dd-99c0-75d572ba1ddd
Fixed: ext-panning removes last created element

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2338 eee81c28-f429-11dd-99c0-75d572ba1ddd