As commands now commit/recalc even in case of failure (as they do not know about exact reason of failure and we're not sure if rollback was succeeded), do not run them for every item added via double-click

gui/builtinAdditionPanes/droneView.py

@@ -206,11 +206,13 @@ class DroneView(Display):
         event.Skip()
 
     def addItem(self, event):
-        sFit = Fit.getInstance()
+        item = Market.getInstance().getItem(event.itemID, eager='group.category')
+        if item is None or not item.isDrone:
+            event.Skip()
+            return
+
         fitID = self.mainFrame.getActiveFit()
-
-        fit = sFit.getFit(fitID)
-
+        fit = Fit.getInstance().getFit(fitID)
         if not fit or fit.isStructure:
             event.Skip()
             return