Feature request: Modify location and settings of lighting and camera

[CLiersch]

This is a feature request:

When inspecting a geometry in the TiGL Viewer, or when generating images for a presentation, somtimes the default location of the lighting source does not fit with the desired view angle onto the model.

A simple dialog box to configure location and direction of lighting would be very helpful. The same would also be useful for camera location and settings, because it would allow to create similar, reproducable images of different CPACS datasets.