faster lobby art init during world start (cmss13-devs#4205)

the lobby art subsystem may as well start a little faster so people
don't see through the illusion during atom init

:cl:
add: you always see lobby art while the world is setting up
/:cl:

code/__DEFINES/subsystems.dm

@@ -113,6 +113,7 @@
 #define SS_INIT_INPUT   85
 #define SS_INIT_FAIL_TO_TOPIC 84
 #define SS_INIT_TOPIC 83
+#define SS_INIT_LOBBYART 82
 #define SS_INIT_RUST    30
 #define SS_INIT_INFLUXDRIVER 28
 #define SS_INIT_SUPPLY_SHUTTLE  25
@@ -162,7 +163,6 @@
 #define SS_INIT_PLAYTIME   -29
 #define SS_INIT_PREDSHIPS  -30
 #define SS_INIT_OBJECTIVES -31
-#define SS_INIT_LOBBYART   -33
 #define SS_INIT_MINIMAP    -34
 #define SS_INIT_STATPANELS -98
 #define SS_INIT_CHAT    -100 //Should be last to ensure chat remains smooth during init.

code/game/turfs/walls/wall_types.dm

@@ -239,6 +239,8 @@
 	icon_state = "fakewindows"
 	opacity = FALSE
 
+INITIALIZE_IMMEDIATE(/turf/closed/wall/indestructible/splashscreen)
+
 /turf/closed/wall/indestructible/splashscreen
 	name = "Lobby Art"
 	desc = "Assorted artworks."

config/example/custom_items.txt

@@ -1 +1 @@
-ckey: name: /path/to/obj
+ckey: name: /path/to/obj

config/example/forumdbconfig.txt

@@ -1,19 +1,19 @@
-# This configuration file is for the forum database, if you need to set up
-# population, death, etc. tracking see 'dbconfig.txt'
-# The login credentials for this will likely differ from those in dbconfig.txt!
-
-# Server the MySQL database can be found at
-# Examples: localhost, 200.135.5.43, www.mysqldb.com, etc.
-ADDRESS localhost
-
-# MySQL server port (default is 3306)
-PORT 3306
-
-# Database the forum data may be found in
-DATABASE tgstation13
-
-# Username/Login used to access the database
-LOGIN mylogin
-
-# Password used to access the database
+# This configuration file is for the forum database, if you need to set up
+# population, death, etc. tracking see 'dbconfig.txt'
+# The login credentials for this will likely differ from those in dbconfig.txt!
+
+# Server the MySQL database can be found at
+# Examples: localhost, 200.135.5.43, www.mysqldb.com, etc.
+ADDRESS localhost
+
+# MySQL server port (default is 3306)
+PORT 3306
+
+# Database the forum data may be found in
+DATABASE tgstation13
+
+# Username/Login used to access the database
+LOGIN mylogin
+
+# Password used to access the database
 PASSWORD mypassword