VK: ability to send messages from/to chats

git-svn-id: http://svn.miranda-ng.org/main/trunk@7571 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
code cleaning

git-svn-id: http://svn.miranda-ng.org/main/trunk@7572 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c