Fix clipboard use after a couple of usages

 Steps to reproduce on Nuxeo 9.10 + HF40:

1. create a workspace TEST under Default domain > Workspaces
2. create 2 Note documents under Default domain > Workspaces > TEST
3. log out
4. log in
5. from the dashboard, browse to the first note
6. click on the icon Add to clipboard
7. observe that the document is added to the clipboard
8. in the breadcrumb, click on Workspaces
9. navigate to TEST then to the second Note document
10. click on the icon Add to clipboard

Observe that nothing happens and in the console there is this error

elements.html:160584 Uncaught TypeError: Cannot read property 'contains' of undefined
    at HTMLElement.toggle (elements.html:160584)
    at HTMLElement.handler (elements.html:2371)
    at Object._fire (elements.html:7377)
    at Object.forward (elements.html:7772)
    at Object.click (elements.html:7738)
    at HTMLElement._handleNative (elements.html:7161)

Expected behavior: the document is added to the clipboard without any error

From my investigation, it should correspond to the backport of ELEMENTS-868 because I was not able to reproduce on 10.10 + HF and on nightly