Fixed position of box item (#2106)

* fixes #2064

lib/timeline/component/item/BoxItem.js

@@ -126,7 +126,8 @@ BoxItem.prototype.redraw = function() {
     // set initial position in the visible range of the grid so that the
     // rendered box size can be determinated correctly, even the content
     // has a dynamic width (fixes #2032).
-    // The correct position is reset by this.repositionX
+    var previousRight = dom.box.style.right;
+    var previousLeft = dom.box.style.left;
     if (this.options.rtl) {
       dom.box.style.right = "0px";
     } else {
@@ -140,6 +141,13 @@ BoxItem.prototype.redraw = function() {
     this.width = dom.box.offsetWidth;
     this.height = dom.box.offsetHeight;
 
+    // restore previous position
+    if (this.options.rtl) {
+      dom.box.style.right = previousRight;
+    } else {
+      dom.box.style.left = previousLeft;
+    }
+
     this.dirty = false;
   }