Attached ScrollBar and ScrollIndicator fail when using QML Type Compiler

The QML Type Compiler reports ScrollIndicator and ScrollBar are not found.

Importing "QtQuick.Controls" from `qt_add_qml_module` has no effect on this issue.

To replicate the issue:

1. Create QML project that has use of Type Compiler enabled
2. In QML, create a ListView, and attach either a ScrollIndicator or a ScrollBar property
3. Build program

Example code is attached. Important excerpts here:

// CMakeLists.txt

qt_add_qml_module(${PROJECT_NAME}
    URI Experiments
    RESOURCE_PREFIX /qt/qml/
    IMPORTS
    "QtQuick.Controls"
    DEPENDENCIES
    QtQuick
    QML_FILES
    "main.qml"
    ENABLE_TYPE_COMPILER
)

// .qml file

import QtQuick.Controls

ListView {
{{    ScrollIndicator.vertical: ScrollIndicator { }}}
}

ListView {
{{    ScrollBar.vertical: ScrollBar { }}}
}{}