When importing a gradebook item from a spreadsheet, the form starts out in an invalid state with no radio buttons selected. It is easy for a user to miss the unselected radio buttons in the column titles, especially when only one item is present in the spreadsheet, and then submit the form only to receive an error because they haven't chosen a column.
If the first radio button were selected by default:
- the form would start in a valid state and the user could not trigger an error
- users would be more likely to notice that the radio buttons exist, as a selected button is easier to see
- users would not have to unnecessarily click on a column when there is only one column in the spreadsheet or the item they wanted to import was is first one
Attached is a patch that selects the first item in the spreadsheet by default.