frontend: Add UUID and creation date

This exposes the new info in the GraphQL API, and adds it to the frontend.

app/queries/get_group_details.graphql

@@ -2,6 +2,8 @@ query GetGroupDetails($id: Int!) {
   group(groupId: $id) {
     id
     displayName
+    creationDate
+    uuid
     users {
       id
       displayName

app/queries/get_group_list.graphql

@@ -2,5 +2,6 @@ query GetGroupList {
   groups {
     id
     displayName
+    creationDate
   }
 }

app/queries/get_user_details.graphql

@@ -6,6 +6,7 @@ query GetUserDetails($id: String!) {
     firstName
     lastName
     creationDate
+    uuid
     groups {
       id
       displayName