Grouping targets drop down by FOLDER property

[itzandroidtab]

I am currently working on a project that has over 15 targets. I was thinking it would be a great idea to support grouping the targets based on the folder property in cmake. I was thinking of something like this. When you click on the folder you would see all the targets in that specific folder:

Currently it is difficult to find the target I want to build:

Information about the folder property
https://cmake.org/cmake/help/latest/prop_tgt/FOLDER.html

[gcampbell-msft]

I'll close this in favor of tracking your PR here: #3953 @itzandroidtab