In Kendo Spreadsheet api doc, under toolbar section: http://docs.telerik.com/kendo-ui/api/javascript/ui/spreadsheet#configuration-toolbar.home
// for all available options, see the toolbar items configuration
// http://docs.telerik.com/kendo-ui/api/javascript/ui/toolbar#configuration-items
So when I try to add attributes to the toolbar item, I get error. See setup in this dojo:
https://dojo.telerik.com/oMiCi
What I ultimately want to do is to add tooltips to the buttons.