When you use the vaults screen to see what items you have with the "all bases" button set, it doesn't actually seem to tell you which hideouts have those items.
Also, at the moment, clicking, middle-clicking, or right-clicking on an item in the vaults screen does nothing. There's a lot of useful things it could do (being able to see the description, research, or uses with one of those clicks would be nice, too.)
But it could be particularly useful to devote one of those types of clicks to opening a window that shows you the distribution of an item between all your bases, ie. you click or right-click on an item in the vaults screen and it shows a list of bases that have that item and how many of each they have. Right now you have to flip through them all to find out where it is.
