Dots of items are now attached to the top panel instead of background panel (no need for z-index tricks)

lib/timeline/component/ItemSet.js

@@ -364,7 +364,7 @@ ItemSet.prototype.show = function() {
 
   // show axis with dots
   if (!this.dom.axis.parentNode) {
-    this.body.dom.backgroundVertical.appendChild(this.dom.axis);
+    this.body.dom.top.appendChild(this.dom.axis);
   }
 
   // show labelset containing labels
@@ -524,7 +524,7 @@ ItemSet.prototype.redraw = function() {
   this.dom.axis.style.top = asSize((orientation == 'top') ?
       (this.body.domProps.top.height + this.body.domProps.border.top) :
       (this.body.domProps.top.height + this.body.domProps.centerContainer.height));
-  this.dom.axis.style.left = this.body.domProps.border.left + 'px';
+  this.dom.axis.style.left = '0';
 
   // check if this component is resized
   resized = this._isResized() || resized;

lib/timeline/component/css/item.css

@@ -12,7 +12,9 @@
 .vis.timeline .item.selected {
   border-color: #FFC200;
   background-color: #FFF785;
-  z-index: 999;
+
+  /* z-index must be higher than the z-index of custom time bar and current time bar */
+  z-index: 2;
 }
 
 .vis.timeline .editable .item.selected {
@@ -88,7 +90,6 @@
   left: -4px;
 
   cursor: w-resize;
-  z-index: 10000;
 }
 
 .vis.timeline .item.range .drag-right {
@@ -99,5 +100,4 @@
   right: -4px;
 
   cursor: e-resize;
-  z-index: 10001; /* a little higher z-index than .drag-left */
 }

lib/timeline/component/css/itemset.css

@@ -18,8 +18,7 @@
   position: absolute;
   width: 100%;
   height: 0;
-  left: 1px;
-  z-index: 1;
+  left: 0;
 }
 
 .vis.timeline  .foreground .group {