More colors on "Synchronize Tool"

[Eugensyl2]

I am wonder why are so few color elements that can be changed into Synchronize tool, not just the background.

For example:
- alternate rows
- files set to copy from left to right (I want to chose between red, green and blue)
- files set to copy from right to left (As above)
- the size, when is different

Maybe we can add another elements.