Fix double HTML escaping in switcher and harden JS edge cases

SQL/postgres/2016052000.sql

@@ -1,11 +0,0 @@
-ALTER TABLE
-	ident_switch
-ALTER COLUMN
-	host
-DROP NOT NULL;
-
-ALTER TABLE
-	ident_switch
-ALTER COLUMN
-	label
-DROP NOT NULL;

SQL/postgres/2016060200.sql

@@ -1,5 +0,0 @@
-ALTER TABLE
-	ident_switch
-ALTER COLUMN
-	username
-DROP NOT NULL;

SQL/postgres/2018081600.sql

@@ -1,5 +0,0 @@
-ALTER TABLE
-	ident_switch
-ALTER COLUMN
-	username
-DROP NOT NULL;

SQL/postgres/2018121800.sql

@@ -1,31 +0,0 @@
-ALTER TABLE
-  ident_switch
-RENAME COLUMN
-  host
-TO
-  imap_host;
-
-ALTER TABLE
-  ident_switch
-RENAME COLUMN
-  port
-TO
-  imap_port;
-
-ALTER TABLE
-  ident_switch
-ADD COLUMN
-	smtp_host
-    varchar(64);
-
-ALTER TABLE
-  ident_switch
-ADD COLUMN
-  smtp_port
-		integer
-		CHECK(smtp_port > 0 AND smtp_port <= 65535);
-
-ALTER TABLE
-  ident_switch
-DROP COLUMN
-  delimiter;

SQL/postgres/2019112000.sql

@@ -1,5 +0,0 @@
-ALTER TABLE
-  ident_switch
-ADD COLUMN
-	imap_delimiter
-    char(1);

SQL/postgres/2019121300.sql

@@ -1,14 +0,0 @@
-ALTER TABLE
-  ident_switch
-ADD COLUMN
-	drafts_mbox
-    varchar(64),
-ADD COLUMN
-	sent_mbox
-    varchar(64),
-ADD COLUMN
-	junk_mbox
-    varchar(64),
-ADD COLUMN
-	trash_mbox
-    varchar(64);

SQL/postgres/2020060100.sql

@@ -1,7 +0,0 @@
-ALTER TABLE
-  ident_switch
-ADD COLUMN
-	smtp_auth
-        smallint
-        NOT NULL
-        DEFAULT(1);