I want to add extra elements (specifically a customized add subcase-link, like http://fogbugz.stackexchange.com/questions/59/bugmonkey-scripts-post-them-here/2794#2794) to the "Case 1234" popup menu on the "List cases" page.
Is it possible to add this (and possibly other) option(s) to the "Case 1234" submenu, using a customization?