Song Editor draws over scroll bar

[michaelgregorius]

Bug Summary

When the play head reaches the vertical scroll bar it will paint over it:

Expected Behaviour

The scroll bar is not painted over.

Steps To Reproduce

1. Load a song that's long enough.
2. Set "Auto Scrolling" to "Off".
3. Play song.

[regulus79]

I'm able to fix the bug by adding a check for if the scrollbar is visible and the line is past it, and if so then not drawing it. Although, a better solution would be to somehow get the scrollbar to be drawn on top of the line.

https://github.com/user-attachments/assets/12520ca4-1f17-4f1f-85ad-3155d59a179b

Also, it seems that the play head triangle acts weirdly at the edge. Perhaps that should also be addressed.

[Rossmaxx]

@regulus79 PR?