I have just found out that the sidebar is now customisable: a user can select and arrange favourite menu items above the More item and hide other menus under the More item. But what is the point to duplicate these custom menu items with pop-up menu items that do the same? For example I added the Forums item and when I hover the cursor over it:
You can double click the item in the main menu and it will open it. Top level menu items are categories as far as I'm aware.

I have just found out that the sidebar is now customisable: a user can select and arrange favourite menu items above the More item and hide other menus under the More item. But what is the point to duplicate these custom menu items with pop-up menu items that do the same? For example I added the Forums item and when I hover the cursor over it: