Loads up the information for the "Look and Layout Preferences" section of the profile.

• Loads up all available themes and smiley sets for the template (regardless of settings - settings are handled by the template itself)
• Loads up $context['easy_formats'], an array of information for the dropdown list of commonly-used time formats
• Uses the 'Settings' language file
• Accessed at ?action=profile;sa=theme or ?action=profile;u={user_id};sa=theme