Merge remote-tracking branch 'origin/5.10' into dev

 Conflicts:
	src/core/download_manager_delegate_qt.cpp
	src/core/download_manager_delegate_qt.h
	src/core/render_widget_host_view_qt.cpp
	src/core/web_contents_adapter.cpp
	src/webengine/api/qquickwebengineview.cpp
	tests/auto/widgets/qwebenginedownloads/tst_qwebenginedownloads.cpp

Change-Id: I2308414ce257ae5bb0fc9f6493aa111a267ff39b