Properly color file labels in project panel (#3794)

Also fixes an error with mouse listeners placement in
https://github.com/zed-industries/zed/pull/3792

Release Notes:

- N/A

crates/ui2/src/styles/color.rs

@@ -13,6 +13,7 @@ pub enum Color {
     Hidden,
     Info,
     Modified,
+    Conflict,
     Muted,
     Placeholder,
     Player(u32),
@@ -28,6 +29,7 @@ impl Color {
             Color::Muted => cx.theme().colors().text_muted,
             Color::Created => cx.theme().status().created,
             Color::Modified => cx.theme().status().modified,
+            Color::Conflict => cx.theme().status().conflict,
             Color::Deleted => cx.theme().status().deleted,
             Color::Disabled => cx.theme().colors().text_disabled,
             Color::Hidden => cx.theme().status().hidden,