* usr/share/byobu/keybindings/f-keys.tmux,
  usr/share/byobu/keybindings/f-keys.tmux.disable,
  usr/share/byobu/keybindings/Makefile.am,
  usr/share/byobu/keybindings/mouse.tmux.disable,
  usr/share/byobu/keybindings/mouse.tmux.enable,
  usr/share/doc/byobu/help.tmux.txt:
  - add support for a new keybinding, Alt-F12, to toggle on/off
    tmux mouse support
  - display a message when toggling either on or off mouse or
    F-keys support
* usr/share/byobu/keybindings/f-keys.screen,
  usr/share/byobu/keybindings/f-keys.screen.disable,
  usr/share/byobu/keybindings/f-keys.tmux,
  usr/share/byobu/keybindings/f-keys.tmux.disable,
  usr/share/doc/byobu/help.tmux.txt: LP: #1218680
  - byobu-screen has long supported Ctrl-A-~ which saves your scrollback
    buffer to a file
  - byobu-tmux had never quite implemented this
  - Add a new keybinding to both byobu-screen and byobu-tmux that adds
    this support, Shift-F9