Remove more references to 'model' in GPUI APIs (#23693)

Release Notes:

- N/A

crates/collab/src/tests/editor_tests.rs

@@ -91,7 +91,7 @@ async fn test_host_disconnect(
         )
     });
     let cx_b = &mut VisualTestContext::from_window(*workspace_b, cx_b);
-    let workspace_b_view = workspace_b.root_model(cx_b).unwrap();
+    let workspace_b_view = workspace_b.root(cx_b).unwrap();
 
     let editor_b = workspace_b
         .update(cx_b, |workspace, window, cx| {

crates/collab/src/tests/notification_tests.rs

@@ -21,14 +21,14 @@ async fn test_notifications(
     let notification_events_b = Arc::new(Mutex::new(Vec::new()));
     client_a.notification_store().update(cx_a, |_, cx| {
         let events = notification_events_a.clone();
-        cx.subscribe(&cx.model(), move |_, _, event, _| {
+        cx.subscribe(&cx.entity(), move |_, _, event, _| {
             events.lock().push(event.clone());
         })
         .detach()
     });
     client_b.notification_store().update(cx_b, |_, cx| {
         let events = notification_events_b.clone();
-        cx.subscribe(&cx.model(), move |_, _, event, _| {
+        cx.subscribe(&cx.entity(), move |_, _, event, _| {
             events.lock().push(event.clone());
         })
         .detach()

crates/collab/src/tests/test_server.rs

@@ -849,7 +849,7 @@ impl TestClient {
     ) -> (Entity<Workspace>, &'a mut VisualTestContext) {
         let window = cx.update(|cx| cx.active_window().unwrap().downcast::<Workspace>().unwrap());
 
-        let model = window.root_model(cx).unwrap();
+        let model = window.root(cx).unwrap();
         let cx = VisualTestContext::from_window(*window.deref(), cx).as_mut();
         // it might be nice to try and cleanup these at the end of each test.
         (model, cx)
@@ -861,7 +861,7 @@ pub fn open_channel_notes(
     cx: &mut VisualTestContext,
 ) -> Task<anyhow::Result<Entity<ChannelView>>> {
     let window = cx.update(|_, cx| cx.active_window().unwrap().downcast::<Workspace>().unwrap());
-    let model = window.root_model(cx).unwrap();
+    let model = window.root(cx).unwrap();
 
     cx.update(|window, cx| ChannelView::open(channel_id, None, model.clone(), window, cx))
 }