Admin can revoke old verifications

In the admin panel / PARTICIPANTS / Verifications page: - On top of the descriptions, create button to revoke direct verifications (not multistep) with two options: > "All": will revoke all direct authorizations from the current organization. > "Verified before": will revoke all direct authorizations from one date backwards (1month by default). - A help text in the "Verified before" option with the hint: "Useful if the process has already started and the admin would like to revoke verifications from the previous process but not from the current". - Notice popup: Info with the number of affected users & user confirmation. Funded by: Ajuntament de Sant Cugat