web/satellite/vuetify-poc: fix file preview

This change fixes an issue where clicking on a file from the upload
snackbar would not preview it.

Issue: #6433

Change-Id: I30b0b6098e058d1069b87f99425fac5d6e421fea

web/satellite/vuetify-poc/src/components/BrowserTableComponent.vue

@@ -416,7 +416,7 @@ function onFileClick(file: BrowserObject): void {
         return;
     }
 
-    obStore.setObjectPathForModal(file.path + file.Key);
+    obStore.setObjectPathForModal(file.path ?? '' + file.Key);
     previewDialog.value = true;
     isFileGuideShown.value = false;
     LocalData.setFileGuideHidden();