Fix popup displayed in Sidebar to match map pop-up config

[JAVT]

This is specifically for instances when you configure the map to remove all the fields from the popup and just have a title. The sidebar app will show all the fields.

[KellyHutchins]

@JAVT  how are you removing all content from the popup. If I go into the map viewer and remove the content from the popup then save the map, close it and reopen it the popup defaults to the list of fields. 

But if I add a text element, edit the text and just add a space then save it seems to respect that and will display the empty popup content in the Sidebar app. 

Here's an example: 

https://jsapi.maps.arcgis.com/apps/instant/sidebar/index.html?appid=c0f0d62c850341ee8c738bb9a94ce73d

[JAVT]

Adding a blank text element is a good work around . Thanks!