Remove white spaces and fix indent.
Remove unused import.
Determine if the object can be selected.

Use the id of the objet and not the canLink method.
Fix selection for dataset and screen.
Load group data

Discussed with Gus. This should help the person import the data
finding the correct target.
Sort the nodes by user and by alphabetical order.
Fix canLink method.
Fix display of user with long names.
Fix display of groups with name >50 characters.
Unify truncation.
Load the group data.
Handle admin case and fix check for canLink method.
Handle the case admin importing for admin.
Change date in header.
Do not use object.canLink for importAs.
Load the data for the group.
Log error if tags cannot be created at import.
Remove unused import.
Close the correct importer

When importing images for another user, the import store
was not correctly closed.
Do not rely on data displayed in tree.