Methods
Compares the POSTed 'oldMode' and 'newMode' with the active and configured purchase price modes
respectively and, if the values match and the mode has changed, converts all purchase prices
depending on the currently active mode. That is, if the active mode is 'net', all purchase prices
are converted from net to gross prices, and if the active mode is 'gross', all purchase prices are
converted from gross to net prices. Finally, future change notifications are hidden until the mode
changes again.
convertPurchasePricesAction()
Responds both the currently active and configured purchase price modes.
getPurchasePriceModesAction()
getViewParams
getViewParams()
Hides all future change notifications until the mode changes again.
hideChangeNotificationAction()