Navigation bar is case sensitive sorted in Visual Studio 2017

I've noticed that, in Visual Studio 2017 (15.2, 26430.6) and with a C++ file, the list of functions in the navigation bar is sorted in a case sensitive way (see image below). This was not the case in Visual Studio 2010.

On the other hand, both the Solution Explorer and the Class View do show functions and methods sorted using a case insensitive order.

Is there any option, configuration file, free plugin, etc., that I can use to change this behaviour? It is very difficult to inspect a file in this way.

Only thing I've found so far, but that is not free, is the Supercharge plugin, that seems to offer its own navigation bar.

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1. In Visual Studio 2017

   

2. Same project open in Visual Studio 2010

   

Note: I'm interested in how to solve this issue, not in code styling suggestions, mixed casing-guidelines, reducing number of functions per-file, etc. I know it is not the best practice but the project is that and I have to deal with it.

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UPDATE: I've upgraded to VS 2017 15.2 (26430.12) this morning and this issue is still present.

The issue was indeed reported a year and a half ago to Microsoft, but yesterday such issue was closed as Won't fix, so no official solutions seems to be available to it.

Here you can find the bug report and the reasons for closing the issue.