fix(dot_tmux.conf): enable mouse support in tmux configuration

Enable mouse support in tmux to allow for scrolling and clicking
within tmux sessions. Although mouse support can interfere with
copying text, the benefits of being able to use the scroll wheel
and click to select panes outweigh the downsides.

dot_tmux.conf

@@ -25,9 +25,9 @@ bind n next-window
 unbind p
 bind p previous-window
 
-# mouse disabled as it prevents copying from tmux easily
+# mouse disabld as it prevents copying from tmux easily
 # down side is that scroll wheel and clicking are also disabled
-set -g mouse off
+set -g mouse on
 
 # Use Alt-arrow keys without prefix key to switch panes
 bind -n M-Left select-pane -L