rename "twinklefluff.js" to "twinklerollback.js"

[NovemLinguae]

Unlike the other module names, "fluff" is not descriptive of what the module does. The word is meaningless to new devs

Thanks to @nardog for the idea.

[RustyCat-1]

@NovemLinguae Do you want the file only to be renamed, or should the module also be renamed (from Twinkle.fluff to Twinkle.rollback)?

[NovemLinguae]

I'm thinking the module too please.

[RustyCat-1]

I believe I have the module renamed most of the way, but I'd like to make sure that both fluff and rollback in Twinkle.disabledModules (on config) make the checkbox checked and I'm not quite sure how to do that. (I thought about adding a condition for checking that specific checkbox, but I don't think that's a good idea.