workspace: Don't update platform window title if title has not changed (#34753)

Closes #34749 #34715

Release Notes:

- Fixed window title X event spam

crates/workspace/src/workspace.rs

@@ -1086,6 +1086,7 @@ pub struct Workspace {
     follower_states: HashMap<CollaboratorId, FollowerState>,
     last_leaders_by_pane: HashMap<WeakEntity<Pane>, CollaboratorId>,
     window_edited: bool,
+    last_window_title: Option<String>,
     dirty_items: HashMap<EntityId, Subscription>,
     active_call: Option<(Entity<ActiveCall>, Vec<Subscription>)>,
     leader_updates_tx: mpsc::UnboundedSender<(PeerId, proto::UpdateFollowers)>,
@@ -1418,6 +1419,7 @@ impl Workspace {
             last_leaders_by_pane: Default::default(),
             dispatching_keystrokes: Default::default(),
             window_edited: false,
+            last_window_title: None,
             dirty_items: Default::default(),
             active_call,
             database_id: workspace_id,
@@ -4403,7 +4405,13 @@ impl Workspace {
             title.push_str(" ↗");
         }
 
+        if let Some(last_title) = self.last_window_title.as_ref() {
+            if &title == last_title {
+                return;
+            }
+        }
         window.set_window_title(&title);
+        self.last_window_title = Some(title);
     }
 
     fn update_window_edited(&mut self, window: &mut Window, cx: &mut App) {