Fix panic with many participants (#4035)

Fix bug from first test

Release Notes:

- (Added|Fixed|Improved) ...
([#<public_issue_number_if_exists>](https://github.com/zed-industries/community/issues/<public_issue_number_if_exists>)).

crates/ui/src/styles/color.rs

@@ -37,7 +37,7 @@ impl Color {
             Color::Info => cx.theme().status().info,
             Color::Placeholder => cx.theme().colors().text_placeholder,
             Color::Accent => cx.theme().colors().text_accent,
-            Color::Player(i) => cx.theme().styles.player.0[i.clone() as usize].cursor,
+            Color::Player(i) => cx.theme().styles.player.color_for_participant(*i).cursor,
             Color::Error => cx.theme().status().error,
             Color::Selected => cx.theme().colors().text_accent,
             Color::Success => cx.theme().status().success,