langpacks/german: small fix

git-svn-id: http://svn.miranda-ng.org/main/trunk@7778 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
forgotten icons' headers recalculation

git-svn-id: http://svn.miranda-ng.org/main/trunk@7779 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
- chat log background color setting merged with kernel chats;
- constants for chat modules

git-svn-id: http://svn.miranda-ng.org/main/trunk@7780 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c