Viewport HDRI Environment Gizmo

[itsallgoode9]

We talked about this quite a while ago and you said you'd add it back but it fell off...Can we please have an environment gizmo in the viewport again? One that rotates an HDR without having to go through the manual process of linking it?

Even though there's been no environment gizmo for a long time, you can still manually link the rotation to a piece of geo (I use an arrow)---but being that it's so simple (yet a tad annoying) to do, can this just be added in by deafult? or a button in the shelf?

If it's a button in the the shelf/menu it'd be great if it would be a sphere, "hidden from camera", with the HDRI mapped as a surface shader, so we can see which way our environment is facing?