BTW, for those who might have Parallels Toolbox, there is also its
Hide Menu Icons tool: rather basic, but seems to work well (and now also has a Bartender Bar-like additional option). Let’s hope that the new Bartender devs will make clear who they are and what they want to do, anyway…
Learn how the Hide Menu icons tool in Parallels® Toolbox can help you manage the icons and hide the ones that you don’t need all that often.
www.parallels.com
(… Hmmm: still seems buggy, as it didn’t remember the exact order of the hidden menu bar items upon reboot.)