Hi,
I would to add some items to grid column header.

It works with classic theme (using Ext.grid.Panel)
https://fiddle.sencha.com/#view/editor&fiddle/2s7u

but it does not work with modern theme (using Ext.grid.Grid)
https://fiddle.sencha.com/#view/editor&fiddle/2s7v

All items get to div with .x-gridcolumn.x-leaf .x-gridcolumn-body-el class with "display: none;" CSS style.

thanks