Logical changes on user registration/my profile/forgot password forms

In-Portal these 2 fields (among other fields) in PortalUser table:

• Login
• Email

Login field is translated everywhere on forms, like "Username" plus actual login can be performed by Email too, but it's never indicated, so users don't know about it.
Also, when "Use Emails As Login" is enabled, then Login/Username field is hidden from a form completely. But maybe user want to enter his username just in case (e.g. for nice mod-rewrite url building scheme).

Based on described above I'm proposing:

• rename [b]PortalUser.Login[/b] to [b]PortalUser.Username[/b] field in database + change phrase name "la_fld_Login" to "la_fld_Username" accordingly
• don't hide Username (former Login) field from registration/my profile/forgot password forms, when "Use Emails As Login" option is turned on
• rename "[b]Use Emails As Login[/b]" configuration setting name to "[b]Username Required During Registration[/b]" (+invert logic in code) to be more user friendly
• use new phrase "lu_fld_EmailOrUsername" (translated as "E-mail or Username") on login dialog