Properly handle rotation of buttons / levers

Buttons and levers can now also be pointed upwards / downwards which will make them connect to corresponding up / down receivers. You will need to use the screwdriver for this.

Receivers cannot be rotated using the screwdriver anymore.

mesecons_button/init.lua

@@ -26,6 +26,7 @@ minetest.register_node("mesecons_button:button_off", {
 	paramtype2 = "facedir",
 	legacy_wallmounted = true,
 	walkable = false,
+	on_rotate = mesecon.buttonlike_onrotate,
 	sunlight_propagates = true,
 	selection_box = {
 	type = "fixed",
@@ -67,6 +68,7 @@ minetest.register_node("mesecons_button:button_on", {
 	paramtype2 = "facedir",
 	legacy_wallmounted = true,
 	walkable = false,
+	on_rotate = false,
 	light_source = default.LIGHT_MAX-7,
 	sunlight_propagates = true,
 	selection_box = {