Add possibility to change default dimensions

It would be nice to add the possibility to change dimensions according to the default dimensions created. For example pallet dimensions are always the same (Lenght and Width), however the height can differ. Because this information is important for transport we would like to have the option to choose a dimension for only length and width (for example if you leave height on 0) and be able to fill in the height manually. 

In several cases 50 pallets are send to customers and all have a different height. This must be filled in for transport. And to fill in all dimensions, while length and height are always the same is not easy working.