Fix interaction of tooltips with loc_vars/generate_ui

[Aurelius7309]

Seals have a localization entry in Other which gets around a weird interaction in generate_card_ui that doesn't allow variables to be passed in. This is not present for Enhancements (which #173 addresses). As a result, it is not possible to pass variables to a modded enhancement tooltip, causing the game to crash if any were expected.

[english5040]

In general enhancements need a second pass, they're pretty jank right now.

Enhancement improvements will be easier when calculation improves.