Do not open the sidebar when opening a new project in a new window (#53776)

Closes https://github.com/zed-industries/zed/issues/53466

Release Notes:

- Fixed the sidebar opening when a new project in a new window was
opened
c771663c8fKirill Bulatov committed on 4/13/2026, 8:21:57 AM· committed by GitHubparent497b6de
2 files changedLine totals unavailable