fix table arrow navigation

Summary: Check for `highlightableRows` was wrong.

Reviewed By: passy

Differential Revision: D9602101

fbshipit-source-id: dbab5efb0c2d71c1a2a018bf035f39d2539f5595

src/ui/components/table/ManagedTable.js

@@ -217,7 +217,7 @@ class ManagedTable extends React.Component<
       this.onCopy();
     } else if (
       (e.keyCode === 38 || e.keyCode === 40) &&
-      !this.props.highlightableRows
+      this.props.highlightableRows
     ) {
       // arrow navigation
       const {rows} = this.props;