base::lambda -> Fn (type alias for std::function).
base::lambda_once -> FnMut (type alias for base::unique_function).
base::lambda_guarded -> crl::guard.
base::lambda_call_type_t -> crl::deduced_call_type.
- Apply markdown formatting (```, `, **, __)
only when sending the message.
- Display connection quality bars in calls.
- Telegram Desktop can update itself through MTProto.
- Bug fixes and other minor improvements.