internal void RemoveInstance(AngledThing angledThing)
{
if (SelectedInstance == angledThing)
{
SetSelectedInstance(null);
}
if (HoverShape == angledThing)
{
HoverShape = null;
}
ThePanel.RemoveInstance(angledThing);
TV.BuildTree(this, ThePanel.TheSet);
Redraw(true);
}