refactoring

docs/batchCodeTable.html

@@ -30,6 +30,7 @@
   <script src="https://cdn.jsdelivr.net/npm/chart.js@4.2.0/dist/chart.umd.min.js"></script>
   <script src="./Utils.js"></script>
   <script src="./UIUtils.js"></script>
+  <script src="./ElementWithSingleChangeEventListener.js"></script>
   <script src="./GoogleAnalytics.js"></script>
   <script src="./BatchCodeSelectInitializer.js"></script>
   <script src="./HistoDescrsProvider.js"></script>
@@ -49764,8 +49765,8 @@
   </p>
   <div id="batchCodeDetails" style="width: 50%">
     <h3 class="heading"></h3>
+    <canvas id="adverseReactionReportsChartView"></canvas>
     <div id="selectBatchcodeCombination">
-      <canvas id="adverseReactionReportsChartView"></canvas>
       <label>Select batchcode combination:
         <select id="batchcodesSelect" name="batchcodes">
         </select>