v1.9.0

Changelog: https://gerrit.avm99963.com/plugins/gitiles/infinitegforums/+log/refs/tags/v1.8.2..refs/tags/v1.9.0

1. ea9b23f Dark theme: minor polishing by avm99963 · 3 years ago v1.9.0
2. 7309b06 Add experiments link to the options page by avm99963 · 3 years ago
3. 76661ce Fix typo in docs/op_indicator.es.md by avm99963 · 3 years ago
4. a858ef7 Deprecate smei_sortdirection option by avm99963 · 3 years ago
5. 3eae452 Add threadListAvatars experiment by avm99963 · 3 years ago
6. bf8eece Add support for experiments by avm99963 · 3 years ago
7. 223416c Dark theme: polish generic components by avm99963 · 3 years ago
8. fb7107c Dark theme: add styles for suggested answers components by avm99963 · 3 years ago
9. 48c87d1 Dark theme: further polishing by avm99963 · 3 years ago