[New Defect] - 3/13/2018[Issue]When keyboard user activates "X" icon on the chat window using keyboard, focus is lost. Here, keyboard moved to the top of the page.Steps to reproduce:1. Open/Activate "Chat" using keyboard (Need to navigate using TAB key)2. Press TAB when Chat open, focus moved to the "x".3. Press "enter" on "x".4. Press TAB, you can see the focus is on the top of the page - a title of the page.[User Impact]Screen reader users and keyboard users not able to navigate elements on the page in logical order and they might confuse with content on the page. When users close chat window, the focus moved to the top of the page and when they navigate all elements from the top, assistive technologies users get confused.[Expected behavior]Ensure that when user activates "X" icon, focus is moved on to the "Chat" button that expand the chat window.Developers can use JavaScript focus() method.