feat(web): have a slider for autocorrect "aggressiveness" 🚂

**Is your feature request related to a problem? Please describe.**

Autocorrect, when done right, greatly facilitates the problem of fat-fingering words typed on tiny phone keyboards. It does this transparently, and often without credit.

However, autocorrect is [nowhere](http://www.autocorrectfail.org/) [near](https://mashable.com/2013/12/24/damn-you-auto-correct-2013/) [perfect](https://www.instagram.com/damnyouautocorrect/).

**Describe the solution you'd like**
A typist may want to have more control over whether autocorrect takes over. Perhaps add a setting — either discrete or continuous — that affects the "aggression" of autocorrect. This could affect some λ in the calculation of weighting the suggestions from the model vs. the weighting of the "fat-fingering" module.

**Product context**
- OS: Android, iOS