Revert "menu structure"

This reverts commit c8dcf444a59708efd90482e343dd1e02cd929ed7.
Revert "Diagrammes"

This reverts commit 837d609da2f2089a1b434cd4f9c25f8872d91187.
Revert "Revert "menu structure""

This reverts commit 4097b79c2d7264a4f75df9ff2e9af12bbbca3984.