Added the new Intelligent fix to the assets table rules column (the new default). This will add the fix only if needed, and removes it only if no longer needed, with messages that tell the end-user what it has done. Resolves gh-616

admin/sql/install.mysql.utf8.sql

@@ -2432,11 +2432,6 @@ CREATE TABLE IF NOT EXISTS `#__componentbuilder_external_code` (
 
 
 
---
--- Always insure this column rules is large enough for all the access control values.
---
-ALTER TABLE `#__assets` CHANGE `rules` `rules` MEDIUMTEXT NOT NULL COMMENT 'JSON encoded access control.';
-
 --
 -- Always insure this column name is large enough for long component and view names.
 --