Draft: POC: work items at group level

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app/assets/javascripts/work_items/graphql/work_item_by_iid.query.graphql

@@ -6,7 +6,7 @@ query workItemByIid($fullPath: ID!, $iid: String) {
       id
       workItems(iid: $iid) {
         nodes {
-          ... WorkItem
+          ...WorkItem
         }
       }
     }
@@ -16,7 +16,7 @@ query workItemByIid($fullPath: ID!, $iid: String) {
       descriptionHtml
       workItems(iid: $iid) {
         nodes {
-          ... WorkItem
+          ...WorkItem
         }
       }
     }