Aaaand renaming NickModel again. Oh well.
Some cosmetic corrections and some minor work on the nick model. Hopefully I now found a usable design.
Various stuff, cosmetic fixes, fiddling with IrcUsers and NetworkInfos in Buffers.
Renaming/moving some files. Apparently, I can't use a QStringListModel since it's in QtGui, so I will probably try my luck using EgS' TreeModel as a base.