ENH: bring Markups jump slices default in line with slice node

Jumping slices default reset to offset as per current vtkMRMLSliceNode
JumpMode.
Slice node and radio button settings are compared and updated on GUI
start up.



git-svn-id: http://svn.slicer.org/Slicer4/trunk@22749 3bd1e089-480b-0410-8dfb-8563597acbee