Enhancement: Add Drag and Drop for the Vocals Section of the Chart Editor Song Creation

[Ronin546]

Issue Checklist

• I have read the Contributing Guide
• I have checked the Issues/Discussions pages to see if my enhancement has already been suggested
• I have properly titled my enhancement

What is your suggestion, and why should it be implemented?

On the chart editor, I suggest that drag and drop should be added to the Upload Vocals section of the Song Creation.

[MightyTheArmiddilo]

Pretty sure this is already in the editor. The code is there for it. The drag & drop handling has always been annoying.