A new command or promt should be added so that numerous items of the same kind can be moved to and from your inventory to chests, bags, sacks etc.
Either one of two ways.
1) Have a command like /move *number* to *place*
i.e /move 20 stone to chest
2) Have it when you move one of the item a little window pops up saying the amount you wish to move then you can type the amount in there.
It takes me ages to move all my minerals into chests and then take them back out when I need them later.
This will just save time.