improve fix for NB#226821
improve fix for NB#226821

 * decorators/mdecorator/mdecoratorwindow.cpp (MDecoratorWindow::createQueryDialog):
   Use magic a QChar instead of magic bytes and add a lengthly explanation.
   This stuff is completely undocumented in Qt and QTranslator doesn't offer
   any support for it.
(cherry picked from commit bfb31d28f9adc77ce0c5818c6a7fa07c6455a346)

nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor