widget for dragging toward/away from camera

When moving or scaling objects/bones, if the axis is pointing directly at the camera, it is impossible to drag it towards you just using screen widgets.

you have to rotate your view move it closer, and then move your view back. This is an annoying hiccup in the workflow, that could be fixed if there was an additional widget that showed up when the normal arrow is pointing towards the screen, so you can still drag an object towards and away from the camera.