Control opacity in BrushLabels

[younesslanda]

Is your feature request related to a problem? Please describe.
I am working on a semantic segmentation project, and I find it hard to correct the mask region due to the high opacity of the colors generated by the brush. I tried RGBA format in the background inside Label, but it transforms it into gray color

Describe the solution you'd like
Add an argument in BrushLabels to control opacity, like opacity=0.6

Describe alternatives you've considered
tried RGBA format in the background inside Label, but it transforms it into gray color

[sajarin]

Thanks for the feature request @younesslanda! Our team will review it and see where it fits in our roadmap.

As an aside, how less painful would it be to have an opacity setting for the brushlabels when making annotations?