CanJS download page: select all plugins checkbox does not work

http://canjs.com/download.html

Clicking "select all plugins" checkbox does nothing: http://take.ms/pVYZy

Should select/deselect all plugins listed below.

Start at download.html and reproduce the "select all plugins" checkbox issue. Inspect how the listed plugins are represented and how the checkbox handles clicks. Done means the checkbox selects all listed plugins and deselects them when toggled again.

Written by the indexing model from the issue text.