Disable whistles from vim

Seems to whistle each time we save file, which is annoying if save takes
longer than moving to other focus (which may be very often).

dotfiles/vim/vimrc

 " UI - GENERAL "
 " '''''''''''' "
 
+set t_vb=
 noremap <F2> :set list!<CR>
 set pastetoggle=<F4>
 nmap <F3> :set invnumber<CR>