Description: ensure that QTabletEvent is not pre-accepted before sending
 In QWidget-world it's normal for input events to have the accepted
 flag false by default, so that it's obvious after visiting a widget
 subclass that does not override a particular handler function that it
 did not handle that event type at all.  For tablet events in
 particular, the contract (to which we've been paying more attention to
 ensure that QTBUG-47007 remains properly fixed) is that if a
 QTabletEvent is not accepted, a mouse event will follow.
 Tablet-unaware applications need to get the same mouse events from a
 Wacom stylus as they would receive from an actual mouse.
 .
 In this case the issue was missing hover events (mouse movements
 in which no mouse button is pressed).  Without those, the enterEvent
 and exitEvent virtuals are also not invoked properly.
Origin: upstream, https://code.qt.io/cgit/qt/qtbase.git/commit/?id=b4b706d454b785ae
Bug: https://bugs.debian.org/935627
Last-Update: 2019-08-24

--- a/src/widgets/kernel/qapplication.cpp
+++ b/src/widgets/kernel/qapplication.cpp
@@ -3374,6 +3374,7 @@ bool QApplication::notify(QObject *recei
                                 tablet->tangentialPressure(), tablet->rotation(), tablet->z(),
                                 tablet->modifiers(), tablet->uniqueId(), tablet->button(), tablet->buttons());
                 te.spont = e->spontaneous();
+                te.setAccepted(false);
                 res = d->notify_helper(w, w == receiver ? tablet : &te);
                 eventAccepted = ((w == receiver) ? tablet : &te)->isAccepted();
                 e->spont = false;
--- a/src/widgets/kernel/qwidgetwindow.cpp
+++ b/src/widgets/kernel/qwidgetwindow.cpp
@@ -1021,6 +1021,7 @@ void QWidgetWindow::handleTabletEvent(QT
                         event->pressure(), event->xTilt(), event->yTilt(), event->tangentialPressure(),
                         event->rotation(), event->z(), event->modifiers(), event->uniqueId(), event->button(), event->buttons());
         ev.setTimestamp(event->timestamp());
+        ev.setAccepted(false);
         QGuiApplication::forwardEvent(widget, &ev, event);
         event->setAccepted(ev.isAccepted());
     }