Set the correct dispatch action for the double-click handler for the pane tab bar (#9221)

Fixes #9003

Release Notes:

- Fixed the double-click action on the terminal tab bar opening a new
buffer instead of a new terminal
([#9003](https://github.com/zed-industries/zed/issues/9003)).

crates/workspace/src/pane.rs

@@ -183,6 +183,7 @@ pub struct Pane {
     _subscriptions: Vec<Subscription>,
     tab_bar_scroll_handle: ScrollHandle,
     display_nav_history_buttons: bool,
+    double_click_dispatch_action: Box<dyn Action>,
 }
 
 pub struct ItemNavHistory {
@@ -242,6 +243,7 @@ impl Pane {
         project: Model<Project>,
         next_timestamp: Arc<AtomicUsize>,
         can_drop_predicate: Option<Arc<dyn Fn(&dyn Any, &mut WindowContext) -> bool + 'static>>,
+        double_click_dispatch_action: Box<dyn Action>,
         cx: &mut ViewContext<Self>,
     ) -> Self {
         let focus_handle = cx.focus_handle();
@@ -346,6 +348,7 @@ impl Pane {
             }),
             display_nav_history_buttons: true,
             _subscriptions: subscriptions,
+            double_click_dispatch_action,
         }
     }
 
@@ -1550,9 +1553,9 @@ impl Pane {
                         this.drag_split_direction = None;
                         this.handle_external_paths_drop(paths, cx)
                     }))
-                    .on_click(cx.listener(move |_, event: &ClickEvent, cx| {
+                    .on_click(cx.listener(move |this, event: &ClickEvent, cx| {
                         if event.up.click_count == 2 {
-                            cx.dispatch_action(NewFile.boxed_clone());
+                            cx.dispatch_action(this.double_click_dispatch_action.boxed_clone())
                         }
                     })),
             )