I have a web mapping application that already has a basemap built in, using our hosted feature layers. So when the user opens this, no basemap (from the basemap gallery) is being shown. While using the drawing widget, users may want to switch between that basemap and the imagery basemap available (using the ESRI Default for organization basemap gallery). However, I don't see a way for a user to remove the basemap they added when selecting the imagery. Their only option is to switch between basemaps within the gallery. Is this correct?