Replace stale pin references with UNDO copy

When we replace a symbol with one that has fewer pins, the old pins
are released, which leaves points to them in the connection graph
dangling.  This updates the pointer to use the cloned copy in the undo
stack until the connection graph is rebuilt with the new data

Fixes https://gitlab.com/kicad/code/kicad/-/issues/17851

include/commit.h

@@ -111,7 +111,7 @@ public:
     ///< before the modification.
     COMMIT& Modified( EDA_ITEM* aItem, EDA_ITEM* aCopy, BASE_SCREEN *aScreen = nullptr )
     {
-        return createModified( aItem, aCopy );
+        return createModified( aItem, aCopy, 0, aScreen );
     }
 
     template<class Range>