This theme is excellent, however it has a few annoying bugs:
1. There is no mark read/unread button
2. The folder list does not scroll automatically when i try to drag&drop messages that are more the way down or up
3. I set vertical layout to be the default in config. If someone changes that to horizontal using the link and then opens a messages and comes back, the setting is forgotten and vertical layout is being used again
Then there is two more, but maybe they are more roundcube-related:
4. In vertical view, it would be good to disable mailto: links on senders, since you often click there if you want to just read the message
5. Clicking on "Inbox" should open the very first page with the newest messages
Hopefully you can fix at least 1-3!