Enh: Datagrid table header should be hidden when there is no data

Just a enhancement request…

When datagrid table is empty (no data yet), the displayed header with quick search fields can (and much of the time will) confuse the user thinking that he/she can add a new row by selecting or fulfilling those fields.

Users may avoid this confusion if they were only shown a straightforward notice (such as “This table does not currently contain any data.”) in red, like in this image below: