Flashback Neoforge Fixed

Fixes:

• Prevent Sable Cleanup's one-shot client UI packets from reopening screens or dialogs during replay playback and seeking, including older recordings.
• Avoid reapplying unchanged NeoForge registry snapshots on every seek, preventing transient block-state ID corruption and client disconnects in large modpacks.
• Recover the replay camera input grab automatically after the first replay finishes loading, without requiring two F1 presses.
• Keep Flashback's title-screen replay button and late-added small mod buttons from sharing the same visual and click area.
• Resolve pause-menu recording-control collisions while preserving normal layouts; colliding side buttons move to a free slot on their right.
• Handle late and render-time button layout changes from mods such as Create: Tweaked Controllers and FancyMenu.