Minimize JS bundles size

[orbitlens]

Currently the size of the main js bundle exceeds 1MB. Possible optimizations:

• [ ] Use preact instead of react
• [ ] Drop MobX dep in favor of centrzliaed state managed with react hooks
• [ ] Drop Trezor support (they don't want to fix things on their side)
• [ ] Use pure js version of the argon2 module if possible – wasm build is pretty huge
• [ ] Trim all unused code and cleanup data models