static public void Merge(this SplitContainer currentsplitter, int panel) // currentsplitter has a splitter underneath it in panel (0/1)
{
SplitContainer tomerge = currentsplitter.Controls[panel].Controls[0] as SplitContainer; // verified by enable on open
Control keep = tomerge.Controls[0].Controls[0]; // we keep this tree..
tomerge.Controls[0].Controls.Clear(); // clear control list - we want to keep these..
tomerge.DisposeTree(0); // tree dispose of all other stuff left, and dispose of tomerge.
currentsplitter.Controls[panel].Controls.Add(keep);
}