🐛 Bugfixes

• Fix some email fields (error report contact, agreement cc address) being required even though they should be optional
• Avoid browsers prefilling stored passwords in togglable password fields such as the event access key
• Make sure that tickets are not attached to emails sent to registrants for whom tickets are blocked (#4242)
• Fix event access key prompt not showing when accessing an attachment link (#4255)
• Include event title in OpenGraph metadata (#4288)
• Fix error when viewing abstract with reviews that have no scores
• Update requests and pin idna to avoid installing incompatible dependency versions (#4327)