Kit manager menu oncesi

undo.py

@@ -99,27 +99,24 @@ class MetaMoveCommand:
 
 
 class AddComponentCommand:
-    """Placing a component, plus the <kit> entry that placing it may have required."""
+    """Placing a component.
 
-    def __init__(self, parent, index, element, schema_parent=None, kit_element=None, label="add"):
+    Nothing here touches <schema>. The kit a placement needs is declared when the file is
+    saved, from the component types actually in the DOM, so undoing a placement takes its
+    kit out of that reckoning without this command having to unwind anything.
+    """
+
+    def __init__(self, parent, index, element, label="add"):
         self.parent = parent
         self.index = index
         self.element = element
-        self.schema_parent = schema_parent
-        self.kit_element = kit_element
         self.label = label
 
     def undo(self):
         if self.element in list(self.parent):
             self.parent.remove(self.element)
-        if self.kit_element is not None and self.schema_parent is not None:
-            if self.kit_element in list(self.schema_parent):
-                self.schema_parent.remove(self.kit_element)
 
     def redo(self):
-        if self.kit_element is not None and self.schema_parent is not None:
-            if self.kit_element not in list(self.schema_parent):
-                self.schema_parent.append(self.kit_element)
         if self.element not in list(self.parent):
             self.parent.insert(self.index, self.element)