Rotation Gizmo not drawn in Display Overdraw mode

[lexum0]

Godot version

3.4.3, 3.4.4.rc1

System information

macOS

Issue description

The rotation gizmo is shown in every mode except Overdraw

Steps to reproduce

Click (E) to enter Rotate Mode, change the viewport to Display Overdraw and the gizmo will be missing

Minimal reproduction project

No response

[Calinou]

This likely occurs because the rotation gizmo now uses a custom shader, and the overdraw shader is not designed to render this gizmo correctly. This will likely have to wait for godotengine/godot-proposals#2138 to be properly fixed.