Rename private attribute _element to _el

Change-Id: I9c7a31bd6844636737ffa6456562b997f5e370a3
diff --git a/dev/js/src/vc/chooseitem.js b/dev/js/src/vc/chooseitem.js
index 039764c..5032895 100644
--- a/dev/js/src/vc/chooseitem.js
+++ b/dev/js/src/vc/chooseitem.js
@@ -82,8 +82,8 @@
       const t = this;
 
       // already defined
-      if (t._element !== undefined)
-	      return t._element;
+      if (t._el !== undefined)
+	      return t._el;
 
       // Create list item
       const li = document.createElement("li");
@@ -94,7 +94,7 @@
       li["onclick"] = t.onclick.bind(t);
 
       li.addT(t._name);
-      return t._element = li;
+      return t._el = li;
     }
   }
 });