windows: Avoid recording minimized position to database (#9407)

Minimizing window records strange position to DB. When Zed is restarted,
the window goes far away.
<img width="975" alt="image"
src="https://github.com/zed-industries/zed/assets/6465609/98dbab71-fdbb-4911-b41a-9c3e498e5478">

So I fixed.

Release Notes:

- N/A

crates/workspace/src/workspace.rs

@@ -754,7 +754,7 @@ impl Workspace {
                             cx.background_executor()
                                 .spawn(DB.set_fullscreen(workspace_id, true))
                                 .detach_and_log_err(cx);
-                        } else {
+                        } else if !cx.is_minimized() {
                             cx.background_executor()
                                 .spawn(DB.set_fullscreen(workspace_id, false))
                                 .detach_and_log_err(cx);