Fix panel state (#13668)

In the latest update, panel loading occasionally occurred randomly,
either before or after workspace deserialization due to their
asynchronous nature. This update addresses the issue by ensuring panels
restore their state based on serialized data, synchronizing their
loading with workspace deserialization.

Release Notes:

- Fixed [#9638](https://github.com/zed-industries/zed/issues/9638)
- Fixed [#12954](https://github.com/zed-industries/zed/issues/12954)

crates/workspace/src/workspace.rs

@@ -3813,18 +3813,18 @@ impl Workspace {
 
                 let docks = serialized_workspace.docks;
 
-                let right = docks.right.clone();
-                workspace
-                    .right_dock
-                    .update(cx, |dock, _| dock.serialized_dock = Some(right));
-                let left = docks.left.clone();
-                workspace
-                    .left_dock
-                    .update(cx, |dock, _| dock.serialized_dock = Some(left));
-                let bottom = docks.bottom.clone();
-                workspace
-                    .bottom_dock
-                    .update(cx, |dock, _| dock.serialized_dock = Some(bottom));
+                for (dock, serialized_dock) in [
+                    (&mut workspace.right_dock, docks.right),
+                    (&mut workspace.left_dock, docks.left),
+                    (&mut workspace.bottom_dock, docks.bottom),
+                ]
+                .iter_mut()
+                {
+                    dock.update(cx, |dock, cx| {
+                        dock.serialized_dock = Some(serialized_dock.clone());
+                        dock.restore_state(cx);
+                    });
+                }
 
                 cx.notify();
             })?;