Small fixes after terminal split (#22468)

* removes cache access workarounds as
https://github.com/zed-industries/zed/pull/21165 is supposed to fix this
* use `WeakModel<Project>` inside `Pane` just in case 

Release Notes:

- N/A

crates/gpui/src/window.rs

@@ -1753,17 +1753,12 @@ impl<'a> WindowContext<'a> {
                 .iter_mut()
                 .map(|listener| listener.take()),
         );
-        if let Some(element_states) = window
-            .rendered_frame
-            .accessed_element_states
-            .get(range.start.accessed_element_states_index..range.end.accessed_element_states_index)
-        {
-            window.next_frame.accessed_element_states.extend(
-                element_states
-                    .iter()
-                    .map(|(id, type_id)| (GlobalElementId(id.0.clone()), *type_id)),
-            );
-        }
+        window.next_frame.accessed_element_states.extend(
+            window.rendered_frame.accessed_element_states[range.start.accessed_element_states_index
+                ..range.end.accessed_element_states_index]
+                .iter()
+                .map(|(id, type_id)| (GlobalElementId(id.0.clone()), *type_id)),
+        );
 
         window
             .text_system