Comment 2 for bug 677081

Finaly I've decided to work on this feature.

I've found that there was already this feature for colors beginings by '#' following by 6 digits, and in this case it take the current Alpha (not full opacity).

My patch use this feature but with or without '#' char. First I remove the '#' if it exists and then if we have 6 digits I add the Alpha.

Because it was simply a rearrangement task (+ a little comment), I don't put my name in authors field.