feat(web): I want 30 candidated for lexical model

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

I want 30 or even more candidated for lexical model, 8 candidates are not enough for many languages such as Japanese, Taiwanese, Cantonese, Chinese.
Maximum 30 or more candidates wiil be better.

### Describe the solution you'd like

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### Describe alternatives you've considered

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### Related issues

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### Keyman apps

- [x] Keyman for Android
- [x] Keyman for iPhone and iPad
- [ ] Keyman for Linux
- [ ] Keyman for macOS
- [ ] Keyman for Windows
- [x] Keyman Developer
- [ ] KeymanWeb
- [ ] Other - give details at bottom of form

### Keyman version

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### Operating system

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### Device

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### Target application

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### Browser

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### Keyboard name

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### Keyboard version

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### Language name

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### Additional context

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