Redesign emoji packs and move it to settings

See merge request !54

# Conflicts:
#   src/utils/request.js

Remove fetching initial data for config

See merge request !56

User actions moderate multiple users at a time

See merge request !55

mailerEnabled must be set to `true` in order to require password reset

See merge request !51

`mailerEnabled` must be set to `true` in order to require password reset (password reset currently only works via email)

List features in the readme

See merge request !50

Add moderation log

* [x]  filtering by specific admin/moderator
* [x]  filtering by date range
* [x]  searching by log message
* [x]  pagination

See merge request !38

Ability to require user's password reset

See merge request !49