Fix typos in comments

Comments contained some typos. Comments have been replaced with
the ‘official’ description from
http://msdn.microsoft.com/en-us/library/8x5x43k7.aspx.

Change-Id: I25dda0911735b4a0d4f306bc95bc984be0080e2f
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Mac: Remove old unified toolbar implementation.

This has been dead code in Qt 5 since WS_MAC isn't
defined any more.

The new implementation is far less intrusive and does
not require a separate layout.

Task-number: QTBUG-34411
Change-Id: I91bf2294086cb7334a0f56eb1bb97464d8d7b2e3
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Windows: Do not print test output to both stdout and system debug log

Avoid piping the test output to both the Windows system debugger, and
stdout. This fixes duplicate output in Qt Creator, which displays messages
from both sources.

[ChangeLog][QtTestLib] The (default) plain text logger on Windows now
logs to either the system debug log (in case no console is open), or
stdout, not both.

Task-number: QTBUG-34630
Change-Id: I35fe9f4a50cc660d79fad7dffa6d19659b2102ae
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>