Update

rc.lua

@@ -804,6 +804,20 @@ screen.connect_signal("arrange", function (s)
     end
 end)
 
+-- Make wibar not on top when fullscreen clients
+function toggle_wibar_ontop(c)
+    if c.fullscreen then
+        c.screen.mywibox.ontop = false
+    else
+        c.screen.mywibox.ontop = true
+    end
+end
+
+client.connect_signal("manage", toggle_wibar_ontop)
+client.connect_signal("focus", toggle_wibar_ontop)
+client.connect_signal("property::floating", toggle_wibar_ontop)
+client.connect_signal("property::fullscreen", toggle_wibar_ontop)
+
 -- awful.screen.set_auto_dpi_enabled(true)
 
 -- load the widget code