title: Maintain navigation history in WebView
body: <p>In my app I have main activity and child activities. An action on main activity opens a child activity. Each child activity loads web page that have various urls all pointing to server locations.
  I am able to navigate to all the urls but when I press back, I am not redirected to the previous page. Instead it exists and brings me to main activity. The back button action should navigate to last url location. How to do that?</p>