[tmux] Improve copy mode, add F12 key toggle

tmux/.tmux.conf

@@ -10,6 +10,19 @@ bind-key C-a send-prefix
 bind-key -n C-b send-keys C-b
 #bind-key -n C-b send-prefix
 
+# Use F12 to toggle hotekys on/off for nested remote tmux sessions
+bind -T root F12  \
+  set prefix None \;\
+  set key-table off \;\
+  set status-style "fg=colour245,bg=colour238"\;\
+  refresh-client -S
+
+bind -T off F12 \
+  set -u prefix \;\
+  set -u key-table \;\
+  set -u status-style \;\
+  refresh-client -S
+
 setw -g mode-keys vi
 set-option -g status-keys vi
 
@@ -62,6 +75,8 @@ set-window-option -g mode-keys vi
 set-option -s set-clipboard on
 set -g @yank_with_mouse off
 set -g @yank_action 'copy-pipe'
+bind-key -Tcopy-mode-vi 'C-right' send -X next-word
+bind-key -Tcopy-mode-vi 'C-left' send -X previous-word
 
 if '[ `uname` == Darwin ]' \
     'source-file ~/.tmux/.mac_config'