Total Reorder Level for Stock Items in the list view

It is possible to add the re-order column to the Stock Control List View however if Multiple Locations is enabled then this column does not work. The column just shows 0.00 even if there is a re-order level entered on the locations tab against the Stock Item. It would be useful if the system could show a message to say that this column will not work if Multiple Locations is enabled, or if the systrm could show a total re-order for all warehouses.