TT-1119: Fixed issues with Piwik bug reporting nothing for 0 value
TT-1119: Fixed issues with Piwik bug reporting nothing for 0 value

Piwik has a bug which is not reporting values of 0. Adding All/Some/None resolves this.

Authors: d85388382e98fb4e3135110026d342422d308d77@jakubmiarka

alphagov/verify-frontend,alphagov/verify-frontend,alphagov/verify-frontend,alphagov/verify-frontend