i3: move displayrc to ^y to free up ^s and enable stacked layout

i3_config

@@ -21,7 +21,7 @@ bindsym $mod+Shift+c kill
 bindsym Control+q exec /bin/true
 
 # start dmenu (a program launcher)
-bindsym $mod+s exec dmenu_multicmd "$HOME/.displayrc.yaml" -i -fn "$font"
+bindsym $mod+y exec dmenu_multicmd "$HOME/.displayrc.yaml" -i -fn "$font"
 bindsym $mod+d exec dmenu_run -p run -i -fn "$font"
 bindsym $mod+p exec dmenu_ssh "$i3_term -e tmux_ssh" -i -fn "$font"
 bindsym $mod+u exec dmenu_pass -i -fn "$font"
@@ -60,7 +60,7 @@ bindsym $mod+v split v
 bindsym $mod+f fullscreen
 
 # change container layout (stacked, tabbed, toggle split)
-#bindsym $mod+s layout stacking
+bindsym $mod+s layout stacking
 bindsym $mod+w layout tabbed
 bindsym $mod+e layout toggle split