3D UMG widgets are still experimental and I have not yet used them, so I don’t know whether you could use them for this. If you can get a 3D UMG widget to look like a 2D widget which is added to the viewport ot might work! 
3D UMG widgets are still experimental and I have not yet used them, so I don’t know whether you could use them for this. If you can get a 3D UMG widget to look like a 2D widget which is added to the viewport ot might work!