the great orientation refactor (move to x & y UiScalars/Spans) + don't call full size in align

src/core/position/sized.rs

@@ -9,16 +9,10 @@ pub struct Sized {
 impl Sized {
     fn apply_to_outer(&self, ctx: &mut SizeCtx) {
         if let Some(x) = self.x {
-            let outer = ctx.outer.axis(Axis::X);
-            ctx.outer
-                .axis_mut(Axis::X)
-                .set(x.apply_rest().within_len(outer));
+            ctx.outer.x.select_len(x.apply_rest());
         }
         if let Some(y) = self.y {
-            let outer = ctx.outer.axis(Axis::Y);
-            ctx.outer
-                .axis_mut(Axis::Y)
-                .set(y.apply_rest().within_len(outer));
+            ctx.outer.y.select_len(y.apply_rest());
         }
     }
 }