The default behavior for the new DataGrid is to hide a filter icon unless you hover over the column header (and have a filter applied). In the previous version the icon remained visible.
Codesandbox https://codesandbox.io/s/mui-datagrid-filter-icon-7rbrk
When a filter is applied it adds a new iconButtonContainer div. The classes are: MuiDataGrid-iconButtonContainer css-ltf0zy-MuiDataGrid-iconButtonContainer
Is there a way to override this behavior? All I'd like to do is set visibility to always be visible when that div is generated by the library.