wdr-ui-element polution

[kekema]

Steps to reproduce:

1. go to https://www.webdatarocks.com/demos/js/pivot-table-demo/
2. right-click on an element outside of the pivot table, for example the Angular image for the Angular page - and from the dropdown menu select 'inspect'
3. in my observation, the class 'wdr-ui-element' is getting added at this very moment, so in this case to the IMG element.

Initially, number of 'wdr-ui-element' elements on the page is 53; after the 'inspect', it has become 54:

I tested also with my browser (chrome) in Incognito mode.

EDIT: in addition as related to the right-click: when you right-click on a column or row header, you get the context menu. Now if you don't select anything in the context menu but move your mouse pointer to any other position outside the pivot component and you right-click again, it will show the context menu again:

whereas normal behavior is to get the std browser context menu.

I don't need any context menu's, so if I can disable this feature as to get rid of the issue, that would also be great.

Thanks for a great component,
Karel.