Added ability for template authors to include additional stylesheets. This allows them to add additional CSS defs while maintaining SQM default defintions. git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@11004 7612ce4b-ef26-0410-bec9-ea0150e637f0
New template for advanced mailbox tree, which uses the dTree package. To use this template, it must first be installed through config/conf.pl git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@10828 7612ce4b-ef26-0410-bec9-ea0150e637f0