Debugtoolbar — tidy_stacktrace issue

[RealJTG]

I've noticed an ambiguous behavior of operation_tracker.py:_tidy_stacktrace() function: if your project located somewhere in "/var/www/html/myproject/", all queries will be marked as internal and hidden.

Probably here we must check file extension but not just "html" substring?

            fname = sys._getframe(i).f_code.co_filename
            if 'html' in fname:
                fnames.append(fname)

[rozza]

Thanks @RealJTG fixed in 0.7