fix config warnings by updating mouse options

TMUX devs replaced the mouse settings:

```
  - mouse-resize-pane
  - mouse-select-pane
  - mouse-select-window
  - mode-mouse
```

with a single on/of toggle "setw -g mouse" in v2.1

more info: 310f0a960c/CHANGES (L12)

.tmux.conf

@@ -12,10 +12,6 @@
 set -g default-command "/bin/bash --login"
 set -g default-shell "/bin/bash"
 
-# enable pbcopy and pbpaste support with reattach-to-user-namespace
- #set-option -g default-command "reattach-to-user-namespace -l bash --login"
-#bind C-c run "tmux save-buffer - | reattach-to-user-namespace pbcopy"
-#bind C-v run "tmux set-buffer \"$(reattach-to-user-namespace pbpaste)\"; tmux paste-buffer"
 
 #run-shell "powerline-daemon -q"
 source ~/Tools/modules/powerline/powerline/bindings/tmux/powerline.conf
@@ -61,12 +57,7 @@ set-window-option -g utf8 on
 set-window-option -g clock-mode-style 24
 set-window-option -g monitor-activity on
 set-window-option -g automatic-rename on
-set-window-option -g mode-mouse on
-set-window-option -g mode-keys vi
-
-#pane options
-set -g mouse-resize-pane on
-set -g mouse-select-pane on
+set-window-option -g mouse
 set -g pane-active-border-fg green
 
 # Window nav