Allow adding items to cargo via double-click

eos/gamedata.py

@@ -489,6 +489,10 @@ class Item(EqBase):
     def isCharge(self):
         return self.category.name == 'Charge'
 
+    @property
+    def isCommodity(self):
+        return self.category.name == 'Commodity'
+
     @property
     def isDrone(self):
         return self.category.name == 'Drone'

gui/builtinAdditionPanes/cargoView.py

@@ -70,7 +70,7 @@ class CargoView(d.Display):
 
     def addItem(self, event):
         item = Market.getInstance().getItem(event.itemID, eager='group')
-        if item is None or not item.isCharge:
+        if item is None or not (item.isCharge or item.isCommodity):
             event.Skip()
             return