Web desktop : taskbar and template clock 24H

Hi :) ,

I don't know how to change the taskbar's time format from 12H to 24H :

Code:

getTaskbarConfig: function () {
        var ret = this.callParent();

        return Ext.apply(ret, {
            quickStart: [
                { name: 'Accordion Window', iconCls: 'accordion', module: 'acc-win' },
                { name: 'Grid Window', iconCls: 'icon-grid', module: 'grid-win' }
            ],
            trayItems: [
                { xtype: 'trayclock', flex: 1 }
            ]
        });
    },

Assitance would be welcome :) ,

Charlotte.