QmlJSEditor: Wrong error on module import

Steps to reproduce:

• have Qt5.11 installed and configured as kit (I've got 5.11.0 official release if that matters)
• create an application from template (Qt Quick Application - Empty)

• • ensure setting minimum required Qt to 5.11

Current result:

• QC marks the line

import QtQuick.Window 2.11

with an error and "QML module not found (QtQuick.Window)."