Often, we would like to give user hints about how to fill a column :
- Custom fields can have a complex behavior that is hard to explain with the column title only.
- Color codes can be used for a column, but there's no place to provide the meaning of each color.
It would be useful to let user add a description text for fields / columns, that would be displayed in a tooltip when hovering the column header.
The "description" field of the "Fields" entity could be used for this purpose, or a new "Tooltip" field