Fix behaviour of group api function

The function that tells us if we're connected to a group now behaves
according to the documentation and returns true if we're attempting
to connect to a group, rather than only returning true if we've
connected with other peers

Author: JFreegman

other/bootstrap_daemon/docker/tox-bootstrapd.sha256

@@ -1 +1 @@
-3d28c914487efaae4336af17b221049c73249fb917d672f5ae6d9c092522a24f  /usr/local/bin/tox-bootstrapd
+b0fafb30bffe21889f06a95edd3867f29a2203d30c2d7e7bf3ef646267f08d64  /usr/local/bin/tox-bootstrapd

toxcore/tox.c

@@ -3050,7 +3050,7 @@ bool tox_group_is_connected(const Tox *tox, uint32_t group_number, Tox_Err_Group
 
     SET_ERROR_PARAMETER(error, TOX_ERR_GROUP_IS_CONNECTED_OK);
 
-    const bool ret = chat->connection_state == CS_CONNECTED;
+    const bool ret = chat->connection_state == CS_CONNECTED || chat->connection_state == CS_CONNECTING;
     tox_unlock(tox);
 
     return ret;