Golden note effect draws outside of player UI when using four players and 'scrolling note stream'

[achimmihca]

This bug is very visible when using scrolling note stream and more than 3 players.

Steps to reproduce

• Set 'note display mode' to 'scrolling note stream'
• Start a song with four player profiles
• When there are golden notes, then the golden note effect does not respect the player UI area.

Expected Behavior

Golden notes of player A should not be drawn in the UI of player B.

Actual Behavior

The golden note effect is still visible in other player areas, scrolling through the whole screen.

Workaround

• Use sentence-by-sentence display mode when playing with more than 3 players.

Implementation Hints

• Reason is that the particle effect is above everything else, thus not respecting the player UI area.
• One solution could be to create VisualElements inside the player UI area instead of using a particle system. But this has probably less optimal performance.
• Another solution might be to do some trickery with the particle effect, something to restrict its drawing area. But not sure if this exists as needed.