docs: QSystemTrayIcon reference

Task-number: QTBUG-32157
Change-Id: I730cc0690edf679d5819c086da74c93b9a293bd6
Reviewed-by: Venugopal Shivashankar <venugopal.shivashankar@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Always use forward slashes in paths passed to cmake.

Otherwise it issues many warnings.

Change-Id: I072afc65eed3f2549e5e5894f8d290c792025e4c
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
QPdfWriter: Fix setting of paper size.

Introduce setter for converting mm to Postscript points.

Task-number: QTBUG-31443

Change-Id: I032118322657ae2a8b3b457010218d6ea3f3e720
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
Search toplevel when setting the active window from focus window.

Task-number: QTBUG-32177
Task-number: QTBUG-32180

Change-Id: I44bea8c15636d788d85d6cbfa737aca5901c532c
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>