- All CTCP messages are now using proper charset en/decodings

- All CTCP messages are now using proper charset en/decodings
- For non-Channel NOTICEs and RPL_NOSUCHNICK the redirection flag is
  set. This flag enables the client to show the message in the buffer
  it has been configured for (Status Buffer, Current Buffer, open Query)

The latter one has no effect for the time beeing as Those Settings are
stored in QtUiSettings which cannot be accessed by the Client.