Comment 12 for bug 1513590

This also affects me with Xubuntu 16.04 up-to-date.
The 'delete item' button is not available (greyed out) and I hover over it, it says I don't have the permissions to do so.
Moving an item out of its category shows the delete button available but when it is pressed (and after confirmation that you want to delete), the item is still there and the delete button not available again.

This is annoying, I have duplicate menu items (all LibreOffice entrances) and wish to delete them.