Code review comment for lp:~widelands-dev/widelands/bug-1378801

Yep, we have 2 different approaches: Yours is to distribute evenly, which makes for elegant code and nice mathematics. Mine is to change one value and then take care of the out of range issues afterwards. I also made sure that values get changed in steps of 5%, and this has the consequence that at most 2 values change at the same time, and I arranged it from bottom to top. I think that's just easier to control for the user. IMO it can get very fiddly if everything keeps changing at once and you want to set something specific.