Check for valid receiver before sending gesture events.

Gesture events sent to a disappearing tooltip can crash. This can most
easily be seen by scrolling over a tooltip on OSX with a magic mouse
middle scroll gesture.

Task-number: QTBUG-42826
Change-Id: Id5510895f63297ca157e3d24a3f4e3a6034586e8
Reviewed-by: Andy Shaw <andy.shaw@digia.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
Check screen before changing cursor

Task-number: QTBUG-43508
Change-Id: I6b525cab2a3958f4e3528ed8102d07984f152e60
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
Doc: corrected broken links qtbase

Task-number: QTBUG-43115
Change-Id: Ib441326083294a6d59d75510142b1481f7b0bc35
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Martin Smith <martin.smith@digia.com>
Fix include headers for qsslcertificate_qt.cpp

The order is:
 1) own header
 2) own private header, if any
 3) other headers

Commit f17d7a124f0fa817a7e1a2dda6f48098432c0dc0 broke the order.

Change-Id: I7225024691db91fd936a057accdad65bacb3f979
Reviewed-by: Richard J. Moore <rich@kde.org>
Temporarily disable the QtDBus tests if the session bus isn't available

This is a temporary measure while the Qt CI system is updated to have
the correct D-Bus configuration. Once it is fixed, this commit should be
reverted, so that we don't run into the situation in which the tests
aren't getting run on some configurations and we never know about it.

Change-Id: I7192d4d95a60dcb63acfa6cc90bfdc58592b0664
Reviewed-by: Alex Blasche <alexander.blasche@theqtcompany.com>