gpui: Unify track_scroll method to receive a reference type (#43518)

Release Notes:

- N/A

This PR to change the `track_scroll` method to receive a reference type
like the
[Div#track_scroll](https://docs.rs/gpui/latest/gpui/trait.StatefulInteractiveElement.html#method.track_scroll),
[Div#track_focus](https://docs.rs/gpui/latest/gpui/trait.InteractiveElement.html#method.track_focus).


```diff
- .track_scroll(self.scroll_handle.clone())
+ .track_scroll(&self.scroll_handle)

- .vertical_scrollbar_for(self.scroll_handle.clone(), window, cx)
+ .vertical_scrollbar_for(&self.scroll_handle, window, cx)
```


https://github.com/zed-industries/zed/blob/56a2f9cfcf0c6a3c38f596b58002953763cd890f/crates/gpui/src/elements/div.rs#L1088-L1093


https://github.com/zed-industries/zed/blob/56a2f9cfcf0c6a3c38f596b58002953763cd890f/crates/gpui/src/elements/div.rs#L613-L620

crates/debugger_ui/src/session/running/breakpoint_list.rs

@@ -575,7 +575,7 @@ impl BreakpointList {
         )
         .with_horizontal_sizing_behavior(gpui::ListHorizontalSizingBehavior::Unconstrained)
         .with_width_from_item(self.max_width_index)
-        .track_scroll(self.scroll_handle.clone())
+        .track_scroll(&self.scroll_handle)
         .flex_1()
     }
 
@@ -776,7 +776,7 @@ impl Render for BreakpointList {
             .child(self.render_list(cx))
             .custom_scrollbars(
                 ui::Scrollbars::new(ScrollAxes::Both)
-                    .tracked_scroll_handle(self.scroll_handle.clone())
+                    .tracked_scroll_handle(&self.scroll_handle)
                     .with_track_along(ScrollAxes::Both, cx.theme().colors().panel_background)
                     .tracked_entity(cx.entity_id()),
                 window,

crates/debugger_ui/src/session/running/memory_view.rs

@@ -229,7 +229,7 @@ impl MemoryView {
                 rows
             },
         )
-        .track_scroll(view_state.scroll_handle)
+        .track_scroll(&view_state.scroll_handle)
         .with_horizontal_sizing_behavior(ListHorizontalSizingBehavior::Unconstrained)
         .on_scroll_wheel(cx.listener(|this, evt: &ScrollWheelEvent, window, _| {
             let mut view_state = this.view_state();
@@ -921,7 +921,7 @@ impl Render for MemoryView {
                     }))
                     .custom_scrollbars(
                         ui::Scrollbars::new(ui::ScrollAxes::Both)
-                            .tracked_scroll_handle(self.view_state_handle.clone())
+                            .tracked_scroll_handle(&self.view_state_handle)
                             .with_track_along(
                                 ui::ScrollAxes::Both,
                                 cx.theme().colors().panel_background,

crates/debugger_ui/src/session/running/module_list.rs

@@ -253,7 +253,7 @@ impl ModuleList {
                 range.map(|ix| this.render_entry(ix, cx)).collect()
             }),
         )
-        .track_scroll(self.scroll_handle.clone())
+        .track_scroll(&self.scroll_handle)
         .size_full()
     }
 }
@@ -279,6 +279,6 @@ impl Render for ModuleList {
             .size_full()
             .p_1()
             .child(self.render_list(window, cx))
-            .vertical_scrollbar_for(self.scroll_handle.clone(), window, cx)
+            .vertical_scrollbar_for(&self.scroll_handle, window, cx)
     }
 }

crates/debugger_ui/src/session/running/stack_frame_list.rs

@@ -913,7 +913,7 @@ impl Render for StackFrameList {
                 )
             })
             .child(self.render_list(window, cx))
-            .vertical_scrollbar_for(self.list_state.clone(), window, cx)
+            .vertical_scrollbar_for(&self.list_state, window, cx)
     }
 }
 

crates/debugger_ui/src/session/running/variable_list.rs

@@ -1557,7 +1557,7 @@ impl Render for VariableList {
                         this.render_entries(range, window, cx)
                     }),
                 )
-                .track_scroll(self.list_handle.clone())
+                .track_scroll(&self.list_handle)
                 .with_width_from_item(self.max_width_index)
                 .with_sizing_behavior(gpui::ListSizingBehavior::Auto)
                 .with_horizontal_sizing_behavior(gpui::ListHorizontalSizingBehavior::Unconstrained)
@@ -1574,10 +1574,10 @@ impl Render for VariableList {
                 )
                 .with_priority(1)
             }))
-            // .vertical_scrollbar_for(self.list_handle.clone(), window, cx)
+            // .vertical_scrollbar_for(&self.list_handle, window, cx)
             .custom_scrollbars(
                 ui::Scrollbars::new(ScrollAxes::Both)
-                    .tracked_scroll_handle(self.list_handle.clone())
+                    .tracked_scroll_handle(&self.list_handle)
                     .with_track_along(ScrollAxes::Both, cx.theme().colors().panel_background)
                     .tracked_entity(cx.entity_id()),
                 window,