Remove unhelpful MobX compuedFn CLI errors when SSRing

[jonator]

Problem

We use MobX for our reactive state management, however it doesn't want to cooperate when next.js does first-pass server-side rendering.

The console is cluttered with the following error repeated:
@osmosis-labs/web: invoking a computedFn from outside an reactive context won't be memoized, unless keepAlive is set

Proposed Solution

Make it go away. Perhaps we could take the approach in this issue. Bonus points if you're able to configure MobX to do SSR without writing our own computedFn wrapper. 👍