Allow filtering by item-type

[Absolvutely]

TL;DR

Inserters and splitters especially should be able to filter by item groups instead of just single items.

What ?

For example fuels, ores, ammos, chests or similar groupings added as a single filtering option in especially inserters and splitters, but could probably also work in requesters and other places.

Why ?

It would expand the options of builds without necessarily increasing complexity. Especially in modded play this would be a great thing to allow for less hassle. I see it being very useful in setting up fuel stations or smelting compounds. It also removes the strict necessity to micromanage ammo, fuel and similar requests when moving to higher tiers of those.

[FuryoftheStars]

+1 on this. As OP stated, it would help eliminate some of the micromanaging that goes with upgrading some things (like ammo or fuel).