Handle PipeRun removals with detaching Components.

Handle PipeRun removals with detaching Components.

Some operations can move Components between PipeRuns. If we create a
PipeRun within such operation, and the undo the modification, removal of
the created PipeRun may remove Components before they are attached to
their original PipeRuns.

1. Now PipeRun removal detaches Components, so that Component structure
remains intact.
2. PipeCOntrolPoint removal work without PipeRun.
3. AbstractVTKNodeMap calls INode.remove() all removed nodes.

gitlab #35

Change-Id: I37ec56302581ab176fe630c91b3cddb301ad1210