message: hide add row button for collection groups
diff: @@ -9,6 +9,8 @@ import {
  Typography,
  Button,
  } from "@material-ui/core";
  +
  +import { isCollectionGroup } from "../../util/fns";
  import AddIcon from "@material-ui/icons/Add";
  import Filters from "./Filters";
  @@ -84,6 +86,7 @@ export default function TableHeader({
  className={classes.root}
  >
  <MigrateButton needsMigration={needsMigration} columns={tempColumns} />
  + {!isCollectionGroup() && (
  <Grid item>
  <Button
  onClick={() => {
  @@ -103,6 +106,7 @@ export default function TableHeader({
  Add Row
  </Button>
  </Grid>
  + )}
  <Grid item>{/* <HiddenFields /> */}</Grid>
  <Grid item>
  