I think it would be great if there is a new warehouse button for launch fuel supply. Click on it and see exactly what you have for 8 rocket fuel types. There even seems to be enough room already present.
Or at least a sort by type function.Would it not be easier to have all the warehouse items with some kind if sub-category?
So the chest icon stays, but you can than select a second one.
Like having all, or only flight items, only repair items, only launch items,...
Because this complete dump of all items in 1 list is not the best way of looking for items.