Update messed things up

[nokotin]

Since I unwittingly customized the default theme to make the forum design, after an update many files were replaced by the original forum design. Since I don't have a backup, many files are lost forever. I have however used some time to make the forum as close as possible as to how it looked like before the update, but many features have now been removed, such as the chat and spoiler tags. I apologize for this and will try to fix everything when I find the time.