[UX] Keep zoom range when replotting a spectrum ?

[erwanp]

Up for discussion, but currently when you recompute a spectrum, or tick the "Simulate an experimental slit" function, the Zoom window is reset. It would be very useful to compare different spectra if it was kept the same (unless you changed the wavenumber range, where we would reset the zoom to the full range ?)

[suzil]

Yup, should be do-able.