Remove Default impl for StatusColors (#3977)

This PR removes the `Default` impl for `StatusColors`.

Since we need default light and dark variants for `StatusColors`, we
can't use a single `Default` impl.

Release Notes:

- N/A

crates/theme/src/styles/colors.rs

@@ -2,7 +2,7 @@ use gpui::Hsla;
 use refineable::Refineable;
 use std::sync::Arc;
 
-use crate::{PlayerColors, StatusColors, SyntaxTheme, SystemColors};
+use crate::{PlayerColors, StatusColors, StatusColorsRefinement, SyntaxTheme, SystemColors};
 
 #[derive(Refineable, Clone, Debug)]
 #[refineable(Debug, serde::Deserialize)]
@@ -219,6 +219,8 @@ pub struct ThemeStyles {
 
     #[refineable]
     pub colors: ThemeColors,
+
+    #[refineable]
     pub status: StatusColors,
     pub player: PlayerColors,
     pub syntax: Arc<SyntaxTheme>,

crates/theme/src/styles/status.rs

@@ -78,15 +78,6 @@ pub struct StatusColors {
     pub warning_border: Hsla,
 }
 
-impl Default for StatusColors {
-    /// Don't use this!
-    /// We have to have a default to be `[refineable::Refinable]`.
-    /// todo!("Find a way to not need this for Refinable")
-    fn default() -> Self {
-        Self::dark()
-    }
-}
-
 pub struct DiagnosticColors {
     pub error: Hsla,
     pub warning: Hsla,