[DUPE-239] Store.insert does not fire 'datachanged' event.

[JacobGu]

The documentation for the Store's datachanged event says as follows:

* @event datachanged
* Fires whenever the records in the Store have changed in some way - this could include adding or removing records,
* or updating the data in existing records
* @param {Ext.data.Store} this The data store
*/
'datachanged'

However, the 'insert' method does not fire the event (also called by 'add' method). It should be corrected as follows with red colored code to be added in fix:

    insert : function(index, records) {
        records = [].concat(records);
        for (var i = 0, len = records.length; i < len; i++) {
            this.data.insert(index, records[i]);
            records[i].join(this);
        }
        if (this.snapshot) {
            this.snapshot.addAll(records);
        }
        this.fireEvent('add', this, records, index);
        this.fireEvent('datachanged', this);
    }

[Jamie Avins]

DUPE: http://www.sencha.com/forum/showthre...insert()-(0.92