vimrc: handle alt window in Windo
vimrc: handle alt window in Windo

Source: https://github.com/Konfekt/FastFold/pull/10

blueyed/dotfiles,scorpiovn/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles