Add a divider below "Usage" in the Edit Prediction menu (#30284)

As it felt untidy without it.

Release Notes:

- N/A

crates/inline_completion_button/src/inline_completion_button.rs

@@ -423,7 +423,8 @@ impl InlineCompletionButton {
 
             if let Some(usage) = usage {
                 menu = menu.header("Usage");
-                menu = menu.custom_entry(
+                menu = menu
+                    .custom_entry(
                         move |_window, cx| {
                             let used_percentage = match usage.limit {
                                 UsageLimit::Limited(limit) => {
@@ -436,8 +437,9 @@ impl InlineCompletionButton {
                                 .flex_1()
                                 .gap_1p5()
                                 .children(
-                                used_percentage
-                                    .map(|percent| ProgressBar::new("usage", percent, 100., cx)),
+                                    used_percentage.map(|percent| {
+                                        ProgressBar::new("usage", percent, 100., cx)
+                                    }),
                                 )
                                 .child(
                                     Label::new(match usage.limit {
@@ -452,7 +454,8 @@ impl InlineCompletionButton {
                                 .into_any_element()
                         },
                         move |_, cx| cx.open_url(&zed_urls::account_url(cx)),
-                );
+                    )
+                    .separator();
             }
         }