[Cooker] 7.0 suggestion: selecting packages

[Patrick Goetz]

It would probably be a lot better to have a check box which indicates
whether a package has been selected rather than changing the color of the
package when clicked.  Another annoyance of the changing colors approach
is that the package is automatically selected/de-selected when you click
on it to see the Info.  A check box would solve this problem, too.