Move OMEMO initialization to profanity intialization

Also store identity keys into account

src/ui/win_types.h

@@ -152,6 +152,7 @@ typedef struct prof_chat_win_t {
     gboolean otr_is_trusted;
     gboolean pgp_send;
     gboolean pgp_recv;
+    gboolean is_omemo;
     char *resource_override;
     gboolean history_shown;
     unsigned long memcheck;

src/ui/window.c

@@ -143,6 +143,7 @@ win_create_chat(const char *const barejid)
     new_win->otr_is_trusted = FALSE;
     new_win->pgp_recv = FALSE;
     new_win->pgp_send = FALSE;
+    new_win->is_omemo = FALSE;
     new_win->history_shown = FALSE;
     new_win->unread = 0;
     new_win->state = chat_state_new();