feat(viz): use the mouse wheel to scroll through slices in negato

Description

Use mouse wheel event to scroll slices in negato 2d views.

Before, wheel event triggered zoom in/out event.

Now simple wheel scrolling allows to scroll slices of the current negato view, zoom event was plugged into CTRL + wheel scrolling.

Closes #709 (closed)

How to test it?

Use an application with one or several negato 2d views (like sightviewer).

• Try mouse wheel scrolling to navigate into slices.
• Try to zoom in/out with CTRL + wheel scrolling.