NAME OF SCP training layer are all identical

[semiautomaticgit]

Discussed in #357

^{Originally posted by GITHUBAntoineDENIS May 17, 2024}
Hello,
When creating "SCP training layer" for calibration or validation ROI drawing, all SCP training layers created show the same name in the "layers" pannel of qgis and do not use the name given when creating the roi file in the working directory.

So if we create first calibration roi for classification, ans then validation roi, they will have both the same name, and this will make it difficult to know which file to choose when we have to indicate the validation roi to use in the accuracy assessment window > select reference vector.

--> it would be easier if the "scp training layer" display the name given rather than "SCP training layer".
Best regards,
Antoine