我想覆盖Ext.ux.LiveSearchGridPanel，这样就不会出现“Search”文本，而是出现一些其他文本，例如“xyz”。
我有一个LiveSearchGridPanel作为：

Ext.define('MyApp.view.main.List', {
    //extend: 'Ext.grid.Panel',
    extend: 'Ext.ux.LiveSearchGridPanel',
    xtype: 'mainlist',
    requires: [
        'MyApp.store.Personnel'
    ],
    title: 'Personnel',
    store: {
        type: 'personnel'
    },
    columns: [
        { text: 'Name',  dataIndex: 'name' },
        { text: 'Email', dataIndex: 'email', flex: 1 },
        { text: 'Phone', dataIndex: 'phone', flex: 1 }
    ],
    listeners: {
        select: 'onItemSelected',
        afterrender: function() {
            console.log('We have been rendered');
        }
    }
});

我在${app.dir}/overrides目录中创建了新文件LiveSearchGridPanel123.js：

Ext.define('Ext.overrides.LiveSearchGridPanel123', {
    override: 'Ext.ux.LiveSearchGridPanel',
   initComponent: function () {
        var me = this;
       console.log(this.self.getName() + ' created 123');
        me.tbar = ['XXX', {
                xtype: 'textfield',
                name: 'searchField',
                hideLabel: true,
                width: 20,
                listeners: {
                    change: {
                        fn: me.onTextFieldChange,
                        scope: this,
                        buffer: 100
                    }
                }
            }, {
                xtype: 'button',
                text: '<',
                tooltip: 'Find Previous Row',
                handler: me.onPreviousClick,
                scope: me
            }, {
                xtype: 'button',
                text: '>',
                tooltip: 'Find Next Row',
                handler: me.onNextClick,
                scope: me
            }
        ];
        me.bbar = Ext.create('Ext.ux.StatusBar', {
            defaultText: me.defaultStatusText,
            name: 'searchStatusBar'
        });
        me.callParent(arguments);
    }
});

我还加了一句

requires: [
        'Ext.overrides.LiveSearchGridPanel123',
   ],

在app.js.中
然后我做了 Sencha 应用程序刷新，但组件保持不变。你能告诉我错误在哪里吗？
screenshot