Star ratings, marker filtering and new playback controls

⭐️ New

• ⏯️ Frame-by-frame step controls. Step through video one frame at a time.
• ⏭️ Marker jump buttons. Jump to the next or previous marker in the player.
• ⭐️ Star ratings on markers, matching the Piston iOS app.
• 🔍 Marker list filtering. Filter by marker name, qualifier or star rating.
• 🏷️ Active marker banner. An on-screen banner shows the active marker as it plays, and you can show or hide it in Settings.
• 🎮 Quick playback controls. Skip, frame step and marker jump controls sit below the video when the marker list is open.
• 🏢 Organisation picker. A prompt after you sign in lets you choose your organisation.

🔨 Improved

• Live streams automatically catch back up to live after a network stall.
• Improved security of stored sign-in credentials.

🐛 Fixed

• Root users were not always recognised after signing in.
• Several crashes and connection reliability issues.