void SetComponentsBg()
{
HslColor gcol = ebox.Style.Background (Gtk.StateType.Normal);
//gcol.L -= 0.03;
if (titleIcon != null)
titleIcon.ModifyBg (Gtk.StateType.Normal, gcol);
foreach (var i in previewImages)
i.ModifyBg (Gtk.StateType.Normal, gcol);
}