Fix available services not correctly displayed

Fix monthly and halfyear active users count

Fixes the header problem rendering statistics page

Buttons for ignore, hide, delete on SPV

[Feature] Statistics page

Added environment-variable to specify Firefox version for testing

fix #5568 - overflow json exporter

5560 Hide community spotlight setting if not enabled

Convert MySQL fields to 4 byte unicode 

Fix merge conflict

Fix bad email formatting

Fix markdown-it linkify blocking Firefox

Dynamic row for MySQL

Set larger column index sizes

Add warning about MySQL collation

Fix database index length

This allows new databases to be created with utf8mb4, on MySQL. The maximum
column size is 767 bytes. Each character is 4 bytes long -> 767 / 4 = 191
characters for the column.

Add missing export_user queue to sidekiq config

Refactor mobile javascript to get rid of console errors.

Fixes also mobile bookmarklet services.

Solved #5482

JSON Exporter, part deux