Colour fill using Symmetry

While using symmetry, I noticed that I had to fill each individual circle on both sides independantly.

As a suggestion: having the option able to fill in the "circle(s)", with the same colour would save time.
Hold would enable you to fill in the circle(s) with the same colour.

I am using circle as an example. This suggestion to fill in an object on both sides does not have to be restricted to circles, boxes,  triangles and so on.