Option to update only values when importing netlist into pcbnew

Often when working on the schematics a number of components is left with TBD values to be resolved or amended later (for example, certain resistor values, exact capacitors values etc). The footprints are more or less fixed by the time the schematics is being implemented on the PCB. That makes it problematic at a later stage to compile an up to date assembly documentation with exact values of those components.

It would be handy to have an option when importing Netlist to only update components' values.