Adds bank account security prefs (#19547)

* Adds bank account security prefs

* right, that's not live yet

* fucking SPACES

* okay i guess we're removing 012 again

* Use INTEGER instead of TEXT for storing preferences.
Plus other changes.

* String represent of bank security level numbers is now shown.

* Fixed typos and added suggestions

* fix explanation

* clarify which account is secure

SQL/players2.sql

@@ -19,6 +19,7 @@ CREATE TABLE players (
     be_special          TEXT,
     disabilities        INTEGER,
     nanotrasen_relation TEXT,
+    bank_security 		INTEGER,
     UNIQUE ( player_ckey, player_slot )
 );