Rename "new account activation" to something else

[rafalp]

In old times of administrating the internet forums, "account activation" referred to process of clicking the activation link in e-mail after registration.

Apparently this wording is currently confusing as hell, and refers to user being active on site (or not), so I am thinking about rewording this to "new account confirmation" in one of future releases of Misago.

[rafalp]

My current idea for this is to have extra flags on user model:

• requires_user_verification: if True, user needs to verify their e-mail address
• requires_admin_verification: if True, admin needs to verify their account