fix HA Group Selector display

displayField must now be set in class body, take opportunity to move out
other config properties from initComponent()

www/manager6/ha/GroupSelector.js

@@ -2,19 +2,6 @@ Ext.define('PVE.ha.GroupSelector', {
     extend: 'PVE.form.ComboGrid',
     alias: ['widget.pveHAGroupSelector'],
 
-    initComponent: function() {
-	var me = this;
-
-	var store = new Ext.data.Store({
-	    model: 'pve-ha-groups',
-	    sorters: { 
-		property: 'group', 
-		order: 'DESC' 
-	    }
-	});
-
-	Ext.apply(me, {
-	    store: store,
     autoSelect: false,
     valueField: 'group',
     displayField: 'group',
@@ -38,12 +25,19 @@ Ext.define('PVE.ha.GroupSelector', {
 		dataIndex: 'comment'
 	    }
 	]
+    },
+    store: {
+	    model: 'pve-ha-groups',
+	    sorters: { 
+		property: 'group', 
+		order: 'DESC' 
 	    }
-	});
+    },
 
+    initComponent: function() {
+	var me = this;
 	me.callParent();
-
+	me.getStore().load();
-	store.load();
     }
 
 }, function() {