Show code of added and removed modules with background

[erykpiast]

So it looks more like code diff on GitHub.

[erykpiast]

There is a conceptual pitfall - we show added modules in red (because adding is wrong in that context) and removed in green, but on diff red means removed and green - added. If we color the background of the added module, there will be significant and possibly not clear dissonance - red label and green code.