Basemaps panel doesn't highlight the basemap that is being displayed upon startup

[kerryrobinson]

Description

When you run the DSA app without changing any settings and using the default demo data, the Topographic basemap is the default in the AppConfig file, and it is shown in the scene by default. However, the Basemaps panel highlights the Imagery basemap in the Basemaps panel. (perhaps it's just highlighting the first baseman by default?)

Expected Behavior

The basemap that is drawn on the scene should be the one highlighted in the Basemaps panel.