The command gets added to the command list, but the shortcut isn’t assigned.
edit: sorry, pasted my xml and it didn’t show up. Anyway, followed the example and shortcut isn’t assigned to the command of the extension I’m making.
edit2: steam, ubuntu, 1.3.18.6-x64
edit3: The command is added successfully (it doesn’t appear in any menu though, despite putting it in the view group.