Move column type icon from cell to column header

[Vladimir-Va]

Hello Gris team. Grist lacks the ability to have different data types in the same column (and it is right). Then why do we need to see a data type icon in each cell? Wouldn't it be better to move this icon to the column heading and display it: For Table widget - when hovering over a header (as well as a column dropdown icon) in header left side. For Card widget - permanently on the right side of the row header.