generated .ts files' name are not matching with the requirement

QDS can generate .ts files with this buttton.

With qtForMCUs: true in .qmlproject, the generated .ts files looked like this:

qml_en.ts

qml_ja.ts

However, I think at least for Qt for MCUs project, the file names should be as follows:

qml_en.en_US.ts

qml_ja.ja_JP.ts

with these names, I could switch the language in Qt for MCUs projects like this:

    MouseArea {
        anchors.fill: parent
        onClicked: {
            Qt.uiLanguage = Qt.uiLanguage === "en_US" ? "ja_JP" : "en_US"
        }
    }