Refactor hooks for dynamically changing wishlist items before scenes start

[Logodaedalus]

Currently there are two approaches:

Display.createKnobs() : makes HTML elements (sliders)
Display.populateKnobs() : actually put in values and binder functions based on dynamic wishlist DSL
Display.processWishlistSettings() : process knob values and do string replacements on dynamic wishlist items

Display.createShimmers() : makes HTML elements (shimmerSpan) and sets values in localStorage
Display.processWishlistShimmers() : takes localStorage values and does string replacements on dynamic wishlist items

I propose that we should re-factor so that we use a #2 approach, and for #1 roll createKnobs() and populateKnobs() together into createKnobs(), and change their function so that they're writing to localStorage. Then we use processWishlistShimmers() approach for finalizing in both cases. This way we can demonstrate two UI approaches to hooking into dynamic wishlists.