This is an experimental project to explore usability enhancements for Drupal's theme settings page.
It comprises two modules:
Theme settings UI extras simplifies the logo and shortcut icon by using radio buttons instead of checkboxes. Custom path and file upload elements are hidden unless needed.
Theme settings vertical tabs arranges the theme settings fieldsets in a neat vertical tabs layout, complete with summaries. (6.x version depends on the Vertical tabs module.)
Both modules can be enabled or disabled at will without affecting the stored theme settings.
This was an experimental module to see if the theme settings page could be improved. No further development is planned. It is not intended for a Drupal 8 port.