Update icon to reflect style

lib/timeline/component/GraphGroup.js

@@ -89,6 +89,10 @@ GraphGroup.prototype.drawIcon = function(x, y, JSONcontainer, SVGcontainer, icon
   if (this.options.style == 'line') {
     path = DOMutil.getSVGElement("path", JSONcontainer, SVGcontainer);
     path.setAttributeNS(null, "class", this.className);
+    if(this.style !== undefined) {
+      path.setAttributeNS(null, "style", this.style);
+    }
+
     path.setAttributeNS(null, "d", "M" + x + ","+y+" L" + (x + iconWidth) + ","+y+"");
     if (this.options.shaded.enabled == true) {
       fillPath = DOMutil.getSVGElement("path", JSONcontainer, SVGcontainer);