SharedQmlEngine: Get rid of quotes around indentation spaces

Before:

kf.kcmutils: Error loading QML file qrc:/kcm/kcm_flatpak/permissions.qml
kf.kcmutils: "    "qrc:/kcm/kcm_flatpak/permissions.qml:21:5: Required property yahaha was not initialized
        required property bool yahaha
        ^

After:

kf.kcmutils: Error loading QML file qrc:/kcm/kcm_flatpak/permissions.qml
kf.kcmutils:     qrc:/kcm/kcm_flatpak/permissions.qml:21:5: Required property yahaha was not initialized
        required property bool yahaha
        ^