conversation: Don't fail to display the newest messages
When loading logs chatty would display the 50 oldest messages while we want the newest ones. Fix this by not reversing the history list and then prepending to the messges list. This is also faster, see https://github.com/GNOME/glib/blob/master/glib/glist.c#L237
Closes: #34 (closed)
Edited by Guido Gunther