UI: Vertical Separation bar displays above the modal.

[AtomicMaya]

Describe the bug
When opening any modal (example: Admin view of user profile), whilst being zoomed in (or on a small monitor), the vertical delimiter between the aside and the main pane is displayed above the modal layer.

To Reproduce
Steps to reproduce the behavior:

1. Zoom in or emulate small screen responsively.
2. Go to any modal, open it. (In my case: Admin/Members, select any member)
3. See UI bug:

Expected behavior
No UI bug.

Screenshots
N/A

Environment (please complete the following information):

• OS: Win 10
• Brave Browser Version 1.38.109 Chromium: 101.0.4951.41 (Official Build) (64-bit)