noop
Next diffs:
1. Move the styles used in `thread-settings-modal.react` from `style.css` to `thread-settings-modal.css`.
2. "Consume" `thread-settings-modal.css` from `thread-settings-modal.react` instead of `style.css`.
3. Remove extraneous selectors from `thread-settings-modal.css` that aren't used in `thread-settings-modal.react`.
4. Fill in styles that are "used" by `thread-settings-modal.react` that don't actually exist anywhere in the repo (eg `current-tab`). Probably by looking through the git history to see what `current-tab` **used** to be.
5.Style the `ThreadSettingsModal` component so it looks decent.