Create "Project Includes" folder to group all the *.pri files included

Distributed Qt libraries usually have .pri file that makes it easy for user to start using the lib.

For example, I have 3 libraries and an application using all of them.
In app.pro I include add 3 libraries by including their .pri-file:

include(../lib_1/lib_1.pri)
include(../lib_2/lib_2.pri)
include(../lib_3/lib_3.pri)

This is great, but will make the project's tree not as obvious as it was. I now see in one column lib_1, lib_2, lib_3 and Sources. Which should not be in one column, because libs are dependency of Sources.

Note, that in this example I have just 3 libs with similar names. If i had more libraries with totally different names, the project's tree would have become an unreadeble mess. 

The suggestion is to create a "Project Includes" filter-directory in the project's tree, which would group all the .pri-files included in the .pro-file.
There are already such filter-dirs like Headers, Sources, QML, Other Files, Resources.

It seems to me that such feature would make it easier for users to use .pri-files.

P.S. the project example is included.