added few properties for flow button and submenuwrote a method to show and hide submenuwote a method to get Controller andmade changes in setSyle, setupLabels and createToolbar
added few properties for the class andmade changes in the constructor function and click method to listen click event on flow button in toolbar view andadded a method to hide flow submenu
changed the preview popup window name to make it identical to learner window name so that they both opens in the same window and there are no two popup window for learner view on onLaunchPreviewResponse
1) added few properties for toolbar to give it a highest depth 2) made some changes in the reSize method for toolbar height which will be static throughout 3) Created a new container for toolbar to load its view with heighest depth