Add context to autocomplete_with_func and use it for omemo trust command

Fix #1068

tests/unittests/config/stub_accounts.c

@@ -14,7 +14,7 @@ char * accounts_find_all(char *prefix)
     return NULL;
 }
 
-char * accounts_find_enabled(char *prefix)
+char * accounts_find_enabled(char *prefix, void *context)
 {
     return NULL;
 }

tests/unittests/pgp/stub_gpg.c

@@ -56,7 +56,7 @@ void p_gpg_free_keys(GHashTable *keys) {}
 
 void p_gpg_autocomplete_key_reset(void) {}
 
-char * p_gpg_autocomplete_key(const char * const search_str, gboolean previous)
+char * p_gpg_autocomplete_key(const char * const search_str, gboolean previous, void *context)
 {
     return NULL;
 }

tests/unittests/xmpp/stub_xmpp.c

@@ -151,7 +151,7 @@ gint presence_sub_request_count(void)
 
 void presence_reset_sub_request_search(void) {}
 
-char * presence_sub_request_find(const char * const search_str, gboolean previous)
+char * presence_sub_request_find(const char * const search_str, gboolean previous, void *context)
 {
     return  NULL;
 }
@@ -266,7 +266,7 @@ GList * bookmark_get_list(void)
     return mock_ptr_type(GList *);
 }
 
-char * bookmark_find(const char * const search_str, gboolean previous)
+char * bookmark_find(const char * const search_str, gboolean previous, void *context)
 {
     return NULL;
 }
@@ -314,7 +314,7 @@ gboolean blocked_remove(char *jid)
     return TRUE;
 }
 
-char* blocked_ac_find(const char *const search_str, gboolean previous)
+char* blocked_ac_find(const char *const search_str, gboolean previous, void *context)
 {
     return NULL;
 }