ENH: Added "jump to slice" feature to 3D view

When the mouse is moved in a slice view with the shift key pressed, all slice views jump to the current mouse position.
This feature is now added for 3D views as well.

It is very useful for segmentation: when some artifacts or irregularities are visible in the reconstructed 3D models then it is very easy to find that place in the slice views and make corrections.

It also makes browsing of atlases easier: the user can point to a model in the 3D view and easily find the corresponding structure in the slice views.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@25063 3bd1e089-480b-0410-8dfb-8563597acbee