Upgrade site and modules to Django 2.2. Remove and replace obsolete
functionality with current equivalents. Update requirements to latest
versions where possible. Remove unused dependencies.
Improve functionality on badge preview. Add styles to make status of workflow clear.
Improve buttons to allow badge reprinting and preview.
Reinstate exception logging and bulk process mode.
Update DataTables styling and components to match other parts of website.
Change licence to CC-BY-SA so YouTube gets appropriate licencing for talks.
This does not correspond to the YouTube Creative Common licence, which is
CC-BY-3.0, which is more permissive than we allow.
Display attendee profile data in normal table without DataTables so
sorting is not applied, causing data to be confusing to read.
Include item quantity in attendee data report for accurate schwag packing.
Show applied vouchers on attendee registration admin page.
Add head title and page title to more areas.
Update the dashboard to show warning for empty categories and have
button to open voucher page.
Fix exception on attendee page when user does not have attendee object.
Allow the recipient on an invoice to be updated without creating a new invoice.
This allows fixing of mistakes easily, especially for when it is given to someone
else to pay and a new invoice would be confusing.
Add shirt types and sizes. Improve messaging about discounts.
Restyle ticket wizard and product category screens. Enable page titles
and messages. Update dashboard to hide raffle.
Enable inventory population for dev container.
Display talk format or proposal kind on review tables and in CSV.
Add suggested status to CSV output, for auto-accept and auto-reject.
Add endpoint to download CSV of proposals for section.
