Fix dropping wastes on the CS

Author: mrvisscher

activity_browser/bwutils/commontasks.py

@@ -199,7 +199,7 @@ def is_node_product(node: tuple | int | bd.Node) -> bool:
     node = refresh_node(node)
     raw_type = node._document.type
 
-    if raw_type in ["product", "processwithreferenceproduct"]:
+    if raw_type in ["product", "waste", "processwithreferenceproduct"]:
         return True
 
     if raw_type == "process" and len(node.upstream(kinds=["production"])):

activity_browser/layouts/pages/calculation_setup/functional_unit_section.py

@@ -154,7 +154,7 @@ def dropEvent(self, event) -> None:
         cs_name = self.parent().calculation_setup_name
 
         keys: list = event.mimeData().retrievePickleData("application/bw-nodekeylist")
-        for key in keys:
+        for key in keys.copy():
             if not is_node_product(key):
                 keys.remove(key)