admin-fe options for account activation

Account Activation is a great anti-abuse feature, but in its current form, it is a bit crippled. There is no easy way for administrators to help users activate their account.

I propose the following improvements:

• Ability on Admin-FE to manually activate an account.
• Ability on Admin-FE to resend a validation email to a user.

mentioned in issue pleroma#1403 (closed)

Great idea, will implement that

assigned to @maxf

mentioned in merge request !63 (closed)

mentioned in merge request !66 (closed)

marked the checklist item Ability on Admin-FE to manually activate an account. as completed

marked the checklist item Ability on Admin-FE to resend a validation email to a user. as completed

mentioned in merge request !68 (merged)

closed via merge request !68 (merged)

mentioned in commit 4d7889d7