You could try creating a plugin using hook parse_templates and code like this, :
Code:
Code:
$quickchooserbits1 = preg_replace('/--(-*)/', '--', $quickchooserbits1);
$quickchooserbits2 = preg_replace('/--(-*)/', '--', $quickchooserbits2);
But this won't change the list of styles that the user sees when they choose a default in the profile (and it might not work for mobile devices). To change it everywhere, you would need to modify the code.