Fix panel deserialization

In the old world, panel loading happened strictly before workspace
deserialization. Now it's inverted.

Fix this by storing on the dock the serialized state so they can restore
state as panels are loaded.

crates/zed/src/zed.rs

@@ -32,11 +32,11 @@ use util::{
 };
 use uuid::Uuid;
 use welcome::BaseKeymap;
+use workspace::Pane;
 use workspace::{
     create_and_open_local_file, notifications::simple_message_notification::MessageNotification,
     open_new, AppState, NewFile, NewWindow, Workspace, WorkspaceSettings,
 };
-use workspace::{dock::Panel, Pane};
 use zed_actions::{OpenBrowser, OpenSettings, OpenZedURL, Quit};
 
 actions!(
@@ -178,10 +178,7 @@ pub fn initialize_workspace(app_state: Arc<AppState>, cx: &mut AppContext) {
             )?;
 
             workspace_handle.update(&mut cx, |workspace, cx| {
-                let (position, was_deserialized) = {
-                    let project_panel = project_panel.read(cx);
-                    (project_panel.position(cx), project_panel.was_deserialized())
-                };
+                let was_deserialized = project_panel.read(cx).was_deserialized();
                 workspace.add_panel(project_panel, cx);
                 workspace.add_panel(terminal_panel, cx);
                 workspace.add_panel(assistant_panel, cx);
@@ -200,7 +197,7 @@ pub fn initialize_workspace(app_state: Arc<AppState>, cx: &mut AppContext) {
                                 .map_or(false, |entry| entry.is_dir())
                         })
                 {
-                    workspace.toggle_dock(position, cx);
+                    workspace.open_panel::<ProjectPanel>(cx);
                 }
                 cx.focus_self();
             })