Fix warning about unused variable in qprintengine_win.cpp.

qglobal.h:979:34: warning: unused variable 'q' [-Wunused-variable]                                 ^
kernel\qprintengine_win.cpp:719:5: note: in expansion of macro 'Q_Q'

Change-Id: I7fbad6c8341a3df1a06d3914209dec22876a2f09
Reviewed-by: Andy Shaw <andy.shaw@digia.com>
Store clipboard before exiting native GTK dialog

Gtk library usually takes care of this when the main
Gtk loop ends, but since Gtk's main even loop is not
used in QGtk2Dialog we have to store clipboard's content
with help of gtk_clipboard_store(). This function
sends a SAVE_TARGETS request to X11 clipboard manager
to save clipboards contents as required by ICCCM.

Task-number: QTBUG-34475
Change-Id: If784c425ea4a36ec1c3a8ddc0cdec080f57681a5
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
WinRT: Set WindowTitle in application switcher

Add platform backend for QWinRTWindow::setWindowTitle.

Task-number: QTBUG-40736
Change-Id: I0b03c9b5977368b38ba63044b00178c3f2bb0b86
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>