[4.0.7] 'select' event is fired when a grid is sorted if selection model is CellModel

[stan.cristian88]

The simplest use case to reproduce this bug is the following:

I just edited the example in the Ext.grid.Panel doc, in basic gridPanel live preview. Below is the edited code:

Ext.create('Ext.data.Store', {
    storeId:'simpsonsStore',
    fields:['name', 'email', 'phone'],
    data:{'items':[
        { 'name': 'Lisa',  "email":"lisa@simpsons.com",  "phone":"555-111-1224"  },
        { 'name': 'Bart',  "email":"bart@simpsons.com",  "phone":"555-222-1234" },
        { 'name': 'Homer', "email":"home@simpsons.com",  "phone":"555-222-1244"  },
        { 'name': 'Marge', "email":"marge@simpsons.com", "phone":"555-222-1254"  }
    ]},
    proxy: {
        type: 'memory',
        reader: {
            type: 'json',
            root: 'items'
        }
    }
});

Ext.create('Ext.grid.Panel', {
    title: 'Simpsons',
    store: Ext.data.StoreManager.lookup('simpsonsStore'),
    columns: [
        { header: 'Name',  dataIndex: 'name' },
        { header: 'Email', dataIndex: 'email', flex: 1 },
        { header: 'Phone', dataIndex: 'phone' }
    ],
    height: 200,
    width: 400,
    renderTo: Ext.getBody(),
    selType:'cellmodel',
    listeners:{
        'select':function(cell, rec, row, col) {
            alert('cell at position ' + row + ' | ' + col + ' was selected');
        }
    }
});

So the only changes I made are:
- added selType: 'cellmodel' to grid config
- added a select listener that will show a pop-up with the selected cell coordinates when the select event is fired.

Expected behaviour:
- the alert pop-up should be showed only when a cell is clicked/selected

Actual behaviour:
- if a cell was clicked, pressing on one of the table headers to sort the data will trigger the select event and the pop-up will be displayed. Example: click on the first cell: a pop-up with 'cell at position 0 | 0 was selected' will be showed. Then click on 'Email' header to sort the grid, and again the same pop-up will be showed. After that the cell is deselected.

[mitchellsimoens]

This example seems to be working fine in 4.1.0.