Fix destination name for 'Fit' zoom levels in hash params

Fixes handling of hash parameters like `#page=0&zoom=Fit`

Actual implementation of fitting was already in `page_view.js`, but incorrect parameter `name: XYZ` was always sent instead of correct Fit* ones.
It's handled in a `switch(..)` in `page_view.js:380` default being doing nothing, so I don't see immediate concern.

I do see harder to update, since modifying switch cases means modifying this array and vice-versa.