Add functionality to obtain unconnected group of markups in the same model

[olevs]

The heading is a bit confusing for me, but from our discussion I assume the wanted functionality is: Add separate centerline segments for the same segment for the same territory ID.

This is possible with the current implementation:

• Add control points and press "Add Vessel Centerline" as normal
• Delete the markup control points before adding the new points. This can be done with the arrow beside the trash bin button.
• Add new control points, and add the new centerline. You may have to press the "Place control point" button, and turn on visibility with the "..." button
• Now two separate centerline segments should be created

[RafaelPalomar]

@dalbenzioG, could you check this?

This is possible with the current implementation:

* Add control points and press "Add Vessel Centerline" as normal

* Delete the markup control points before adding the new points. This can be done with the arrow beside the trash bin button.

* Add new control points, and add the new centerline. You may have to press the "Place control point" button, and turn on visibility with the "..." button

* Now two separate centerline segments should be created

[dalbenzioG]

@dalbenzioG, could you check this?

This is possible with the current implementation:

* Add control points and press "Add Vessel Centerline" as normal

* Delete the markup control points before adding the new points. This can be done with the arrow beside the trash bin button.

* Add new control points, and add the new centerline. You may have to press the "Place control point" button, and turn on visibility with the "..." button

* Now two separate centerline segments should be created

Yes, sure.

[olevs]

I enabled the drop down for adding more point lists. Now it should be possible to keep adding new point lists to make new disconnected centerline segments: https://github.com/ALive-research/Slicer-Liver/pull/170