Moved CIU and RMO server commands into the FSession class.
Character names are now shown as a coloured URLs for channel invites.
Moved the various 'ChannelMode' enums into 'flist_enums.h'.
bugfix: Was not setting the mode of a channel in the UI when the initial channel data was received.
bugfix: Status icons in the character list for a channel should now update when a character's status changes.