Make collapse class to work in two ways
|Reported by:||paolo||Owned by:||Jacob|
|Has patch:||no||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
It is really useful to present some fieldsets collapsed in the admin interface and just with one click get them opened. It would be equally useful, once uncollapsed, to have the possibility to collapse them again.
In a such way users can better organize the space on their Django admin interface.