Resolve #320 and add related migration step.
Fix migration bug.
Only give out a warning instead of failing completely if scaffold's save_settings fails.
Fix #292; A better Link.selected(): it can select a link with the @@ prefix; doesn't get confused by Links a shorter version of their own name
Add special handling in ``_update_children_paths`` when the "child" is the node being renamed, in which case the path has already been updated.
Merge pull request #359 from disko/feature/320_fix_path_inconsitency

Resolve #320 and add related migration step.