[implemented] A static collecionIndex please

[Ayantir]

At EACH dlc, you change collectionIndex of Eidetic Memory (category 2).

I spend so much time to manage compatibility while you could give us some indexes that don't move.

So please even if only I and UESP are the only ones to be involved, stop moving the collectionIndex of Eidetic Memory.

With SoH and 1 Tamriel, index have changed 3/4 times during minor patchs of PTS, now you added the Yokudan and instead of pushing this collection AFTER the list.. you moved it in the middle and moved all index.