BUG: Multiple images can have the same name

[Onetchou]

"isUnique(name) in the nameLineEdit works if you compare an image name to a point name, but not if you name 2 images the same because we're not adding the image as a VGObject so the image name is not unique.
So in the image_tool we’re going to need to define an image GOType, create a VGObject, and call

enum class GOType : char {Point, Arc, EllipticalArc, Spline, SplinePath, CubicBezier, CubicBezierPath, Unknown, Curve, Path, AllCurves, Image};

VGObject::VGObject(const GOType &type, const quint32 &idObject, const Draw &mode)
    :d(new VGObjectData(type, idObject, mode))
quint32 VContainer::AddGObject(VGObject *obj) 
{
    SCASSERT(obj != nullptr)
    QSharedPointer<VGObject> pointer(obj);
    uniqueNames.insert(obj->name());
    return AddObject(d->gObjects, pointer);
}

This will add the object and thus the name to the list of unique names. Then when you call IsUnique(name), it can compare the image name against the uniqueNames list that would include any images."