Vulkan: 3D gizmo handles are no longer transparent
Created by: Calinou
Godot version: Git https://github.com/godotengine/godot/commit/11cd8b8e4afdbd42f82459c48c9f6fd604ea1455
OS/device including version: Fedora 31, NVIDIA 440.44, GeForce GTX 1080
Issue description: The red 3D gizmo handles no longer have a transparent background, which means a black square is visible around them:
Broken
Working (in 3.2)
From my testing, this seems to date back to November 2019 at least (if not earlier).
Steps to reproduce: Create a new project, create a GIProbe node or any other node with gizmo handles then select it.