From 3c9c87d4d701d79c95651eea4151df494ef488f0 Mon Sep 17 00:00:00 2001
From: Aron Helser <aron.helser@kitware.com>
Date: Fri, 22 Jun 2018 16:32:59 -0400
Subject: [PATCH] fix(StateMapEditor): default entry blank.

User explicitly sets all tags in control rod label map.
---
 src/simput/StateMapEditor.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/simput/StateMapEditor.js b/src/simput/StateMapEditor.js
index fc90029..b59c511 100644
--- a/src/simput/StateMapEditor.js
+++ b/src/simput/StateMapEditor.js
@@ -31,6 +31,8 @@ export default class StateMapEditor extends React.Component {
     // Extract control maps
     const controlMapIds = Object.keys(assembly).filter((id) => {
       labels[id] = assembly[id].labels;
+      // add blank entry, so user sets all values explicitly.
+      if (labels[id].length) labels[id].unshift('');
       return assembly[id].type === 'control';
     });