currently a column can not be duplicated, so the process to add a new column that should just be as an existing one is cumbersome (1. add a new empty column, 2. duplicate the content of an existing column, 3. moving the different blocks one by one under the new column, 4. adding (if any) virtual classes of the existing column to the new one).
Thus the requested feature should also copy virtual classes attached the “source column”.
Enabling such an option would be especially helpful when columns are used to design rows