When processing a signal or an image, the analysis result is kept from original object

[PierreRaybaut]

To Reproduce
Steps to reproduce the behavior.

Example in the context of signal processing:

1. Create a signal (e.g. a Gaussian curve)
2. Compute the FWHM (Analysis menu)
3. Normalize the signal
4. The new signal still has the FHMW result from the original one, but it is displayed at the Y value associated to the non-normalized signal

Expected behavior
Either the FWHM should be recomputed so that it is shown at the right Y position, or it should be removed from signal.

General case
This is an issue for every single processing feature: analysis results should be removed when processing data.