Clean up Changelog layout

Hello,

Looking at the latest changelog, there was confusion as to what fixes were applied to which version of the game in some sections. Could we please going forward try to keep the fixes organized that pertain to Vanilla / TBC / WotLK to reduce confusion please?

For example: the last patch notes start with general changes, item changes, vanilla changes and then back to interpreting as back to WotLK and then back and forth between content from then on. I realize it's supposed to be read as generalized changes for all realms, but since the main section title(s) are missing after the vanilla-only section, it gets messy in interpretation.

Thank you.