One further usability aspect that I've just noticed and may be worthwhile mentioning is that the value in the quantity field is applied to all the items added from the text file. Not sure whether this is by design but it works really well.
Set it to 1 prior to adding weapons, shields, armor, etc text files.
Set it to 99 prior to adding a text file containing consumable items.
Set it to 999 prior to adding the arrows, bolts text file
As a result, all imported items can be easily assigned the appropriate quantity