This has been implemented!
Now, if you use the Community Menu you’ll see up to 7 projects automatically displayed there, based mostly on whether you admin them and when they were last updated. It should be an improvement over the last broken implementation.
But, you should also see a “Customize” option below it. Click on that and you’ll go to the Content & Display section of your Account Setttings, where you can choose up to seven projects to be shown in that menu instead.
If you search for a project and select it, it will appear on the list. You can drag and drop to reorder them, and click on Remove to remove the project from the list.
Each change is saved automatically, but you need to refresh your page to see the changes reflected in the Community menu.
Let us know if you find any bugs by making a topic in Bug Reports.