label was not correctly linked to drop-down

pdb-ui/src/main/resources/resources/js/ui.js

@@ -471,7 +471,7 @@ Vue.component('search-bar', {
   	<form id="search-bar" v-on:submit.prevent.stop>
   		<search-bar-query v-bind="{ 'searchBar': searchBar }"></search-bar-query>
   		<div id="filter-bar">
-	  		<label for="search-group-by-0">Group:</label> 
+	  		<label for="groupByKeys0">Group:</label> 
 	    	<group-by-item 
 		      	v-for="item in searchBar.groupByKeys"
 		      	v-bind:key="item.id"
@@ -601,7 +601,7 @@ var rootView = new Vue({
 	
 		for (var i = 0; i < 3; i++){
 			self.searchBar.groupByKeys.push({
-				'id': i,
+				'id': 'groupByKeys'+i,
 				'selected': groupByDefaults[i] ? groupByDefaults[i] : '',
 				'options': options
 			});