A small new feature that clears the mask completely on the current mesh island. Closes #104022 When hovering outside the object the Expand operator is running on, it will get floodfilled with the mask/face set. Previously, when the Invert option was used, it wouldn't also clear the mask/face set when hovering outside the object. Pull Request: https://projects.blender.org/blender/blender/pulls/111665