Pos.Bottom returns PosCombine (+0)

[tznind]

Describe the bug

Calling Pos.Bottom is not returning the correct (simplest) Pos.

It is returning

Pos.Combine(Pos.View(side=bottom, target=View()({X=0,Y=0,Width=0,Height=0}))+Pos.Absolute(0))

Instead of

Pos.View(side=bottom, target=View()({X=0,Y=0,Width=0,Height=0}))

Here is a unit test which currently fails on v2:

[Fact]
public void DoNotReturnPosCombine()
{
var v = new View ();
var pos = Pos.Bottom (v);

Assert.Equal (
	"Pos.View(side=bottom, target=View()({X=0,Y=0,Width=0,Height=0}))",
	pos.ToString ());
}

Additional context
While adding + 0 doesn't cause any behaviour in client apps it is still confusing. Additionally it causes issues with TerminalGuiDesigner which really wants to know if a View currently has relative, absolute etc positioning.

[BDisp]

In this case all them (X, Y, Left, Top, Right, Bottom) are wrong as well because they all return PosCombine(Pos.View(), Pos.Absolute(0))