/**
* Sorry for a small objection:
* I wonder why my try to force the color module settings fieldset to collapse
* on the settings of a theme we prepare for contribution doesn't work.
* It works for logo and favicon fieldset but not for color,
* while the namespace seems to be correct (?).
*/
$form['theme_settings']['#collapsible'] = TRUE; //works
$form['theme_settings']['#collapsed'] = TRUE; //works
$form['color']['#collapsible'] = TRUE; // doesn't work !
$form['color']['#collapsed'] = TRUE; // doesn't work !
$form['logo']['#collapsible'] = TRUE; //works
$form['logo']['#collapsed'] = TRUE; //works
$form['favicon']['#collapsible'] = TRUE; //works
$form['favicon']['#collapsed'] = TRUE; //works
}