Web Only: Auto Switching of Buttons at end of Topic (Content List): Back or Next Button

Fun fact! The button at the end of the Topic screen (Content List) auto switches based on whether you enable the Project Map Manager. This applies to Web only. 

• Project has map: show back button (see https://app.gametize.com/topic/82082)
• Project does not have map: show next button if there is next topic, otherwise show back (see https://app.gametize.com/topic/67624)