#370 add hasImageRefs-Check to prevent errors due null

app/src/components/shared/sharedFilter/SharedTable.ts

@@ -231,7 +231,7 @@ export default class SharedTable extends Vue {
             if (item.sectionEvents) {
                 item.sectionEvents.collection.forEach((event) => {
                     imageRefsUrl = [];
-                    if (event.imageRefs.collection.length) {
+                    if (this.hasImageRefs(event)) {
                         event.imageRefs.collection.forEach((imageRef) => {
                             imageRef.thumbnailRefs.collection.filter((thumbnailRef) => {
                                 if (thumbnailRef.url.includes("medium")) {