0030726: Visualization - change Selected state of owner in AIS_Selection

0030726: Visualization - change Selected state of owner in AIS_Selection

AIS_InteractiveContext::IsHilighted() behavior has been changed.
It should use the same logic for owner processing like when it is highlighted. IsSelected of owner is used for selection state, not highlight.

 Without this correction, object is never shown as selected by click (Select(bool)):
 if (!HighlightStyle (theOwner, aCustomStyle) ||
    (!aCustomStyle.IsNull() && aCustomStyle != anObjSelStyle))

 IsSelected is already true, so the highlight style is equal to selection style, nothing to do.