We're already tracking the last view along with the last event, so
use that instead of always assuming the drag started from the window's
content view.
Fixes: QTBUG-102584
Pick-to: 6.2 6.3
Change-Id: Ibe8506b0f91ecdfe6e7fe91e17c129b4d7552880
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: <stefan.wastl@native-instruments.de>
1fbd8c282e