v5.16.0 Mongoose 7 and Challenge Safety

API

• Feature: Disallow banned words from inclusion in Challenge text fields (@CuriousMagpie, @SabreCat)
• Fix: Use language preference when displaying FAQ answers (@umbrella-h)
• Chore (but important!): Upgrade to Mongoose 7 (@phillipthelen, @negue, @SabreCat)
• Chore: Locale files updated (@weblate)

Client

• Feature: Updates to support banned word handling (@CuriousMagpie)
• Feature: Enable more subscription-related fields for editing in admin panel (@phillipthelen)
• Fix: Clean up visuals on reporting modal (@CuriousMagpie)