• Touchpad swipe back to go back in navigation history.
• Touchpad swipe between folders if they're horizontal.
• Out-of-the-box monochrome tray icon on Linux.
• Icons telegram{,{,-attention,-mute}-panel} are renamed to org.telegram.desktop{,{,-attention,-mute}-symbolic} for unified icon lookup in multiple (sometimes sandboxed) builds and GTK icon recolorization support.
• Snap package got icon theming support, the icon names are snap.telegram-desktop.{,{,-attention,-mute}-symbolic} (notice the name ends with a dot in case of no suffix!).