fix for window flashing in StdChat & Scriver

git-svn-id: http://svn.miranda-ng.org/main/trunk@7809 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
chat init must be done inside ME_SYSTEM_MODULESLOADED

git-svn-id: http://svn.miranda-ng.org/main/trunk@7810 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c