In order to test the updated segmentation plugin the checklists have to be updated. This includes:
- removing multilabel segmentation checklists
- except for utilities
- removing tests for Watershed and Fast Marching
- updating description of interpolation (only works with a single label)
- hide (multilabel) segmentation utilities checklists as we are aware of the bugs
- use "show only selected nodes" instad of "auto-selection"