ignore window.scrollXY as the lasso draws relative to the canvas, not window

Author: japrescott

src/lasso-manager/index.js

@@ -126,8 +126,8 @@ const createLasso = (
     const { left, top } = element.getBoundingClientRect();
 
     return [
-      event.clientX - left + window.scrollX,
-      event.clientY - top + window.scrollY,
+      event.clientX - left,
+      event.clientY - top,
     ];
   };