Propose to rename the lineBroadening into Apodization

Since it is not integrated in the FiltersToolBar, yet, I propose that you rename the lineBroadening function into "apodization". In this way, we will not only do exp multiplicaiton (line broadening) with it but also apply other window functions. You could add options (sin, sin2... in the menus similar to the one for zero filling) to select the one we wish. It would be nice that if the data come from (say) Bruker data, the default apodization is the one used on the spectrometer.