Long emails get truncated and formatting breaks on longish HTML emails

customers using emails heavily find that emails stored in vtiger are truncated, this especially messes up HTML emails. This is because the body of the email is stored in the description TEXT column in the vtiger_crmentity table and TEXT has a limit of about 64k, which isn't that much with HTML emails. Moving to MEDIUMTEXT with a limit of 16MB fixes these issues, there is also LONGTEXT which can store gigabytes, but that probably isn't a good idea. Really we shouldn't be storing so much huge stuff in the most important table in the database, ideally the description should be in some other table linked to vtiger_crmentity when needed.