The 'arrow' icon is always on the right of icons. If you want to move it to the left, you have to do this by yourself.
var c = $('#cc');
var icon = c.combobox('getIcon', 1);
icon.prependTo(icon.parent());
Or you can define your own 'arrow' icon instead.
$('#cc').combobox({
hasDownArrow: false,
icons:[{
iconCls:'combo-arrow',
handler:function(){
//...
}
},{
iconCls:'icon-database-refresh'
}]
})