Import state from DMI state

[mirrorcult]

its often in ss13 that various parts relating to an object (item sprites, inhands, clothing sprites) are atomized across multiple DMIs, so you end up having to import all of them, remove the necessary states (or export as PNG), then reimport as png which is annoying

it would be nice if this submenu had a way to just import a state by name from a DMI rather than having to do it roundabout

[PJB3005]

this would probably be served more easily by just adding support to copy/paste states between two open tabs.