fix: force rails to update flags
no longer using singletons; they're just to scary
fix: use correct action
now inserting `all` slug automatically (why didn't I do that in the first place?)
fix #140: don't use @message but the parameter `m`
fix: admin decisions overrule community decisions
fix: do not raise an exception but redirect and show an error message
fix: threads has attribs as well, and it may contain classes, too