two focus problem concerning tabbed_(gc)chat_window
if open a chat window with FOO and you double click FOO on roster, roster window keeps the focus!
also if you give focus to chat window focus, message_text_view doesn't have focus it's ok coz I don't like the cursor blinking (see psi). but we catch keypress but Ctrl+V [paste from clipoard doen't work] it blocks from Ctrl :)