Auto Research: Show the total cost of each queued technology

[minno726]

It would be really useful to have the research queue show how many science packs are required to research the tech and its prerequisites, excluding the ones that are prerequisites of the ones higher in the queue. So for example, if the techs are like:

A: 100 red packs
B: 200 red packs, requires A
C: 200 red 200 green, requires A
D: 300 red 300 green, requires B and C

then if the queue is A-B-C-D, it would say that A costs 100 red, B costs 200 red, C costs 200 red and 200 green, and D costs 300 red and 300 green. However if the queue is B-C, it would say that B costs 300 red (since A is a prereq), but C still costs the same since A is covered already.

As for the UI, maybe a tooltip on the science pack icon in each queue entry?