The multilabel segmentation utilities view shows a large gap between two single node selection widgets after the QmitkDataSelectionWidget was refactored in T27034.
Setting the size policy of each included `QmitkDataSelectionWidget` to minimum and fixed will remove the gap between multiple selection widgets that have been added using `QmitkDataSelectionWidget::AddDataSelection`.
Before:
{F1828198}
After:
{F1828226}