Fix display of actions menu

Steps to reproduce:

1. log in with a non admin user
2. navigate to a document where you have only Read permission
3. observe that the actions are correctly displayed in the upper right menu
4. navigate to the parent thanks to the breadcrumbs
5. navigate back to the document and observe that a scrollbar is displayed in the menu and the Export label is displayed too

Expected behavior: when navigating back to the document, the menu must be displayed without scrollbar or label

This bug can be reproduced on https://nightly-2021.nuxeocloud.com/nuxeo