I've seen a post for an "Item Lock" so that items in your bag might be prevented from being used (such as donated, dropped, given away accidentally) but I'd like to see a Bag Lock.
Items that I put into this bag could be increased up to their maximum, but if there are empty slots, they would remain empty when a new item is acquired and then filtered down to an open slot in an unlocked bag.
I just like my bags to be organized when I'm out so that I know certain types of items are in a specific bag labelled "Meals" or "Donations", etc.
That's all I'm askin' for!