tmux: Change <C-a>! to place behind current window

Analog to <C-a>c the new window should be placed behind the current one.

.config/tmux/tmux.conf

@@ -54,6 +54,9 @@ bind > splitw -h -c "#{pane_current_path}"
 # Create new window with CWD as PWD and place it after the current one
 bind c neww -a -c "#{pane_current_path}" -t #{active_window_index}
 
+# Break off the current pane to a new window behind the current one
+bind ! breakp -a -t #{active_window_index}
+
 # Resource config
 bind R source-file "$XDG_CONFIG_HOME/tmux/tmux.conf" \; \
        display "Sourced $XDG_CONFIG_HOME/tmux/tmux.conf"