Incorrect "Undo" behavior when a sub-alignment is dragged and dropped

1. Select a sub-alignment with several rows in the the Alignment Editor and drag it to the left side.
2. Click "Undo" (several times).

Expected result is that the sub-alignment should be moved to the original position.
Instead, it is moved column by column and row by row, so a user has to click and click and click "Undo" a lot of times to return the sub-alignment to the original position.