Revert "CesiumViewer: Disable bing sessions for now"

This reverts commit 987f66b.

Author: Williangalvani

src/components/CesiumViewer.vue

@@ -23,6 +23,7 @@
 import {
     Ion,
     Color,
+    createDefaultImageryProviderViewModels,
     ProviderViewModel,
     UrlTemplateImageryProvider,
     Viewer, createWorldTerrainAsync,
@@ -296,8 +297,7 @@ export default {
             /*
             *  Creates and returns the providers for viewing the Eniro, Statkart, and OpenSeaMap map layers
             * */
-            // const imageryProviders = createDefaultImageryProviderViewModels()
-            const imageryProviders = []
+            const imageryProviders = createDefaultImageryProviderViewModels()
             imageryProviders.push(new ProviderViewModel({
                 name: 'StatKart',
                 iconUrl: require('../assets/statkart.jpg').default,