I dunno how well this could be implimented, but could we possibly get a condensing ability on retainers? Basically like sort, but it looks at the items stored on every single one.

What I mean is; say retainers tier from first made to last made, and using this option condenses everything upwards (from last retainer to first).

So wyvern wing stacks (for example) on retainer A and retainer D condense onto retainer A, freeing up bag space. I find this would be kinda useful after the increased stack limits recently...

I'm aware I can /itemsearch, but I'd rather have a quicker method...
And probably not useful for those who have a materia retainer, mats retainer, armour retainer, etc etc.. but the option would be nice. xD