rename a bit

src/core/align.rs

@@ -11,7 +11,7 @@ impl Widget for Aligned {
         painter.draw_within(&self.inner, region);
     }
 
-    fn size(&mut self, ctx: &mut SizeCtx) -> Vec2 {
+    fn get_size(&mut self, ctx: &mut SizeCtx) -> Vec2 {
         ctx.size(&self.inner)
     }
 }