/**
 * All field in a FormPanel to readOnly
 * @param {Ext.form.FormPanel} form
 * @param {boolean} readOnly
 * @returns {void}
 */
formReadOnlyAllFields: function(form, readOnly){
    Ext.suspendLayouts();
    form.getForm().getFields().each(function(field) {
        field.setReadOnly(readOnly);
    });
    Ext.resumeLayouts();
}