tmux mouse toggle

gistfile1.txt

 # Toggle mouse on with ^B m
 bind m \
   set -g mode-mouse on \;\
   set -g mouse-resize-pane on \;\
   set -g mouse-select-pane on \;\
   set -g mouse-select-window on \;\
   display 'Mouse: ON'
  
 # Toggle mouse off with ^B M
 bind M \
   set -g mode-mouse off \;\ 
   set -g mouse-resize-pane off \;\
   set -g mouse-select-pane off \;\
   set -g mouse-select-window off \;\
   display 'Mouse: OFF'

instead of mode-mouse it should be mouse