Return None for price column on ship modes, fixes #322

Author: blitzmann

gui/builtinViewColumns/price.py

@@ -33,7 +33,7 @@ def __init__(self, fittingView, params):
         self.imageId = fittingView.imageList.GetImageIndex("totalPrice_small", "icons")
 
     def getText(self, stuff):
-        if stuff.item is None:
+        if stuff.item is None or stuff.item.group.name == "Ship Modifiers":
             return ""
 
         sMkt = service.Market.getInstance()