fix(ui): SNegato2D Camera crash when a single frame is provided

Description

Enhance the SNegato2DCamera filter to prevent navigation in a image with a single slice. (2D image)

Closes #883 (closed)

How to test it?

Run an application with a SNegato2D and an associated SNagato2DCamera.

Give it a 2D image and display it.

Use the mouse centre wheel. Nothing should happen.