Drop unused code

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Refactor code, add CLogDlg::GetShowingPath()

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Implement Confirm Close for Log Dialog when ESC is pressed

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>