Re #10256. Smooth all or selection of spectra.
Re #10256. Updated the unit test.
Re #10256. Copy the axis.
Re #10256. Multispectra unit tests.
Re #10256. Fix compiler warning.
Re #10256. More documentation.
Re #10256. Added progress reporting.
Merge remote-tracking branch 'origin/feature/10256_wiener_smooth_all_workspace'