OPTIONAL System's Context Menu

TL;DR:

Mimic 7zip's implementation of System's Context Menu as sub-menu.

Long version:

I'm a really long time user of Sublime Text Editor because it fits my keyboard-centric usage of computers. With fman I found the Holy Grail, thanks you so much for it and honestly is a shame there's not enough buzz around it (I found it less than a week ago).

Now, since I need to use macOS with W10 in Seamless Mode of Virtual Box and a miriad of VMs with Linux, having a standard File Manager across OS' is trilling. However for Windows a little more extensibility than the one customized context menu and plugins is needed; precisely the one provided by the OS for each file type.

(And yes, I've searched and read context menu related issues like #466, #678, the blog and the help.)

7-zip File Manager in Windows (as shown in the image) has the perfect solution to the problem (having the system's context menu as a sub-menu of its own). It can be toggled easily for the users who don't need/want it.

What you think? This will put to rest current requests and please both: users who are happy with the current context menu and user who want system's.

Stay safe!

No files, tests, or entry points are named. Start by reviewing the existing context-menu implementation and the referenced issues, blog post, and help page; done means an optional system context menu is available as a submenu, matching the requested 7-Zip behavior.