The Menubar button in the NotebookBar is, well, useless on macOS. You should remove it only on macOS.
Steps to Reproduce:
1. Open LibreOffice (any app) on macOS
2. Activate NotebookBar
The menu bar button in the top-left is shown but does nothing.
It shouldn't show on macOS.
User Profile Reset: No
Don't think that we can make the Notebookbars application specific. Szymon, Sumit, shall we resolve this as WF?
I think we can do a small hack to hide that one item.
So let's hack it.
Any updates ?
*** Bug 153781 has been marked as a duplicate of this bug. ***