This reverts commit d4743b14

Add member_count to /invites/:id

See merge request !3

Fix category edit.

Add Edit Role route.

Add badge ID.

Members: Assign / un-assign multiple roles.
Servers: Routes to set permissions.

Server: Add role create / delete route.

Feature: Roles and group permissions. (server-side)

Web Push: Send events if mentioned

Servers: Add VoiceChannel.

Messaging: Allow multiple attachment upload.