Drag and Drop of multiple files uploads files one at a time

Summary

When you try to attach files to a page using drag and drop by dragging multiple files. Files are uploaded one at a time instead of the previous behavior that uploads it at the same time.

Environment

Confluence 1000.0.0-e4c9fdd183b

Steps to Reproduce

1. Access a Page
2. Drag and Drop multiple files to a page

Expected Results

Files should be uploaded at the same time

Actual Results

Files are uploaded one at a time