add some missing aliases (and rearrange them)

standard_signs.lua

@@ -38,16 +38,21 @@ signs_lib.register_sign("default:sign_wall_steel", {
 	allow_yard = true
 })
 
+minetest.register_alias("signs:sign_hanging",                   "default:sign_wood_hanging")
+minetest.register_alias("basic_signs:hanging_sign",             "default:sign_wood_hanging")
+minetest.register_alias("signs:sign_yard",                      "default:sign_wood_yard")
+minetest.register_alias("basic_signs:yard_sign",                "default:sign_wood_yard")
 
-minetest.register_alias("default:sign_wall_wood_onpole",  "default:sign_wood_onpole")
+minetest.register_alias("default:sign_wall_wood_onpole",        "default:sign_wood_onpole")
+minetest.register_alias("default:sign_wall_wood_onpole_horiz",  "default:sign_wood_onpole_horiz")
+minetest.register_alias("default:sign_wall_wood_hanging",       "default:sign_wood_hanging")
+minetest.register_alias("default:sign_wall_wood_yard",          "default:sign_wood_yard")
 
-minetest.register_alias("default:sign_wall_wood_hanging", "default:sign_wood_hanging")
-minetest.register_alias("signs:sign_hanging",             "default:sign_wood_hanging")
-minetest.register_alias("basic_signs:hanging_sign",       "default:sign_wood_hanging")
+minetest.register_alias("default:sign_wall_steel_onpole",       "default:sign_steel_onpole")
+minetest.register_alias("default:sign_wall_steel_onpole_horiz", "default:sign_steel_onpole_horiz")
+minetest.register_alias("default:sign_wall_steel_hanging",      "default:sign_steel_hanging")
+minetest.register_alias("default:sign_wall_steel_yard",         "default:sign_steel_yard")
 
-minetest.register_alias("default:sign_wall_wood_yard",    "default:sign_wood_yard")
-minetest.register_alias("signs:sign_yard",                "default:sign_wood_yard")
-minetest.register_alias("basic_signs:yard_sign",          "default:sign_wood_yard")
 
 table.insert(signs_lib.lbm_restore_nodes, "signs:sign_hanging")
 table.insert(signs_lib.lbm_restore_nodes, "basic_signs:hanging_sign")