ENH: Add slice intersections toggle to Markups

Added a check box inside the jump slices group box. It's
available to toggle when jump slices is on. It updates
when entering the module, but isn't listening to the
slice composite nodes to update when the Navigation
menu and/or MRML updates happen.
Added test.

Issue #3326


git-svn-id: http://svn.slicer.org/Slicer4/trunk@22930 3bd1e089-480b-0410-8dfb-8563597acbee