[jl-wynen]

This PR generalises the FlatVOxelViewer if DREAM and moves the implementation into ESSreduce.

I changed how the dimension selector works to allow users some control over which dimensions are shown on which axis. And I also added support for slicing dims so we can get slicer plots at the same time.

Here is an example for the simualted BIFROST data:

This was mostly written by Claude. I tested the widget with data fro dream and bifrost.

[g5t]

Does channel * length have the same sense as pixel number? E.g., can I multiply arc * tube by 900 and add it to channel * length to get the pixel number?
If so, then this could be a great starting point for a mpltoolbox interface to visualize/update a mask too (I guess that is already planned and/or implemented).

[jl-wynen]

Does channel * length have the same sense as pixel number? E.g., can I multiply arc * tube by 900 and add it to channel * length to get the pixel number? If so, then this could be a great starting point for a mpltoolbox interface to visualize/update a mask too (I guess that is already planned and/or implemented).

This tool allows you to reorder the plot dims any way you like. But yes, in the example above, the order corresponds to the detector number.

We have not planned to add masking tools to this. But that could be an option in the future.