What is the package name for the Ubuntu MATE "compact menu"?

I installed mate-desktop and mate-desktop-environment on a stock Ubuntu 18.04 system for testing, but I didn't get my preferred choice of menus to add to the panel, the "Compact Menu".

If you install a full-up Ubuntu MATE system, you get this choice. Here is a screenshot showing that install with the Compact Menu installed, the help screen, and some other menu choices.

Here's a screenshot from the test system showing that the Compact Menu is not a choice.

What package do I need to install to get the Compact Menu?

Brief search in the source code gives a clue that such menus are provided by mate-panel package.

There was a commit in mate-panel by Matrin Wimpress from Oct 7, 2019 which introduces the rename from "Main Menu" to "Compact Menu".

So we have the following:

• on Ubuntu MATE 18.04 LTS and earlier it is really named "Main Menu"

  

• on Ubuntu MATE 20.04 LTS and newer it is named "Compact Menu"