tmux: fix prefix and shortcut settings (#7549)

adjusting the tmux lines for setting the prefix.
previously the prefix option would be set in the prefix key table, causing it to not register correctly.

- updated tests

tests/modules/programs/tmux/prefix.conf

@@ -15,7 +15,7 @@ set -g mode-keys   emacs
 # rebind main key: C-a
 unbind C-b
 set -g prefix C-a
-bind -N "Send the prefix key through to the application" \
+bind -n -N "Send the prefix key through to the application" \
   C-a send-prefix
 
 

tests/modules/programs/tmux/shortcut-without-prefix.conf

@@ -15,9 +15,8 @@ set -g mode-keys   emacs
 # rebind main key: C-a
 unbind C-b
 set -g prefix C-a
-bind -N "Send the prefix key through to the application" \
-  a send-prefix
-bind C-a last-window
+bind -n -N "Send the prefix key through to the application" \
+  C-a send-prefix