XTemplate用于自定义显示列表中的行。对于选择，您需要在循环中的列表上使用setSelection方法，该循环将获取具有active=="1"的所有记录。检查以下代码，这里还有一个提琴显示它在工作：

Ext.application({
    name: 'Fiddle',
    launch: function () {
        let store = Ext.create('Ext.data.Store', {
            fields: ['id', 'name', 'active', 'label'],
            data: [{
                "id": "0",
                "active": "1",
                "label": "RST",
                "name": "строка 1"
            }, {
                "id": "1",
                "active": "0",
                "label": "KAS",
                "name": "строка 2"
            }, {
                "id": "2",
                "active": "1",
                "label": "UKR",
                "name": "строка 3"
            }, {
                "id": "3",
                "active": "0",
                "label": "KJV",
                "name": "строка 4"
            }, ]
        });

        let list = Ext.create({
            xtype: 'list',
            store: store,
            mode: 'MULTI',
            queryMode: 'local',
            fullscreen: true,
            margin: '10 10 10 10',
            itemTpl: '<div class="contact">{id} <b>{label}</b> {name}</div>',
            renderTo: Ext.getBody(),
        });

        store.each(function (record, id) {
            if (record.get('active') == "1") {
                list.setSelection(record);
            }
        });
    }
});