Multi exposure layer names/codes

[Hazoooka]

For consideration.

Thank you so much Tiago for the multi exposure option.
The lates discussion about multi exposure [https://github.com//discussions/848] got me thinking.
Perhaps it would be a good idea to name the extra exposure passes so the slices can me added by scripting.
Now, every extra pass is just another layer, another number out of thousands.
If possible, naming the layer, e.g. 100.1, meaning layer 100 pass 1, could add additional functionality to this powerful tool. So the script could find a slice bitmap 100.1 and automatically attach it to this particular layer.