ui checkbox update and friend addition via public key

src/profile.py

@@ -802,6 +802,9 @@ class Profile(Contact, Singleton):
                 tox_id = tox_dns(tox_id)
                 if tox_id is None:
                     raise Exception('TOX DNS lookup failed')
+            if len(tox_id) == TOX_PUBLIC_KEY_SIZE * 2:  # public key
+                self.add_friend(tox_id)
+            else:
                 result = self._tox.friend_add(tox_id, message.encode('utf-8'))
                 tox_id = tox_id[:TOX_PUBLIC_KEY_SIZE * 2]
                 item = self.create_friend_item()