Show detailed poll results

[timvahlbrock]

Checklist

• [ ] Tests written for new code (and old code if feasible).
• [ ] New or updated public/exported symbols have accurate TSDoc documentation.
• [ ] Linter and other CI checks pass.
• [x] I have licensed the changes to Element by completing the Contributor License Agreement (CLA)

This is an early draft PR. So far it only shows a face pile next to the number of votes for each poll option. It will need further changes, like:

• [x] Limiting the amount of faces shown per poll option
• [ ] Ability to show votes as lists, for cases where face pile might not be sufficient to identify all users
• [ ] Tests

[CLAassistant]

All committers have signed the CLA.