Rename fields in ThemeColors (#3242)

This PR applies a number of field renames in the `ThemeColors` struct
from the `import-theme` branch.

This will help prevent this branch from diverging too far from `main`.

Release Notes:

- N/A

---------

Co-authored-by: Nate Butler <iamnbutler@gmail.com>
Co-authored-by: Marshall Bowers <1486634+maxdeviant@users.noreply.github.com>

crates/workspace2/src/pane.rs

@@ -1363,12 +1363,12 @@ impl Pane {
 
         let (tab_bg, tab_hover_bg, tab_active_bg) = match ix == self.active_item_index {
             false => (
-                cx.theme().colors().tab_inactive,
+                cx.theme().colors().tab_inactive_background,
                 cx.theme().colors().ghost_element_hover,
                 cx.theme().colors().ghost_element_active,
             ),
             true => (
-                cx.theme().colors().tab_active,
+                cx.theme().colors().tab_active_background,
                 cx.theme().colors().element_hover,
                 cx.theme().colors().element_active,
             ),
@@ -1432,7 +1432,7 @@ impl Pane {
             .id("tab_bar")
             .w_full()
             .flex()
-            .bg(cx.theme().colors().tab_bar)
+            .bg(cx.theme().colors().tab_bar_background)
             // Left Side
             .child(
                 div()

crates/workspace2/src/status_bar.rs

@@ -44,7 +44,7 @@ impl Render for StatusBar {
             .items_center()
             .justify_between()
             .w_full()
-            .bg(cx.theme().colors().status_bar)
+            .bg(cx.theme().colors().status_bar_background)
             .child(self.render_left_tools(cx))
             .child(self.render_right_tools(cx))
     }

crates/workspace2/src/workspace2.rs

@@ -2697,7 +2697,7 @@ impl Workspace {
 
     fn render_titlebar(&self, cx: &mut ViewContext<Self>) -> impl Component<Self> {
         div()
-            .bg(cx.theme().colors().title_bar)
+            .bg(cx.theme().colors().title_bar_background)
             .when(
                 !matches!(cx.window_bounds(), WindowBounds::Fullscreen),
                 |s| s.pl_20(),