LCA2022 Setup

Update dates and descriptions for LCA2022.
Remove old miniconf proposal types.
Add local timezone to speaker profile.

Update to Django 2.2

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.

Allow voucher code to be passed in via query param

Voucher form now accepts a "voucher" query string parameter
with the value to be pre-populated when the form is rendered.

Registrasion updates

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.

Add button to update invoice

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.

Finalise registration

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.

Switch to LCA2020

Remove LCA2018 and LCA2019 styles and content.
Add base LCA2020 styling and update references to year.

Disallow profile updating if user is checked in

It gives a flash and pops the user back to dashboard.

Add overlay badge support

Support so print can print only important text.

SVG modified to use display:inline/none based on overlay True/False and
a symlink to make it easy to change to a completely seperate svg if that
is not optimal.

SVG added layers to split text and graphic so graphics can be easily
hidden and printed.

Closes: #38

Update badge rendering to reflect actual render

* Switch to showing the PNG version by default, as this reflects what
will actually be rendered and sent to the printer
* Include the greyscale filter
* Include the twemoji font we'll use for rendering the badges

Voucher form needs to be processed first

Because otherwise, the firstform (which will not be in a valid start)
throws errors which prevent the voucher form from ever being processed.

Add support for badge PDFs also

* Add a greyscale filter to text for more accurate preview
* Always default to SVG preview as it's the most accurate (cairo
doesn't do a great job of handling custom fonts when it converts to
png/pdf)
* Always use roboto font.

Further changes to support badge generation for lca2018

* Undo some of the debugging done early in this series of patches
* Add ability for a user to preview their own badge
* Add a template for the LCA2018 badge

Badges work by copy-pasting lca2017/pyconau2017 code around

WIP - Push for share

Remove unicode warning

We now support more unicodes so remove the warning

Add notes to profile form about being able to edit form

Also about the known issue with some emoji

Alter guided_registrasion logic to handle new page

This is required for the new method of accepting terms and conditions

Add a "Back" button to the guided_registration stages

"Next" is green, indicating that it's the default path, the way
forward. "Back" is available but blue.

For extra consistency, the initial "Get ticket" button is now also a btn-success

git subrepo pull vendor/registrasion

subrepo:
subdir: "vendor/registrasion"
merged: "3545a80"
upstream:
origin: "git@gitlab.com:tchaypo/registrasion.git"
branch: "lca2018"
commit: "3545a80"
git-subrepo:
version: "0.3.1"
origin: "???"
commit: "???"

git subrepo clone git@gitlab.com:tchaypo/registrasion.git vendor/registrasion

subrepo:
subdir: "vendor/registrasion"
merged: "7cf314a"
upstream:
origin: "git@gitlab.com:tchaypo/registrasion.git"
branch: "lca2018"
commit: "7cf314a"
git-subrepo:
version: "0.3.1"
origin: "???"
commit: "???"

git subrepo pull vendor/registrasion

subrepo:
subdir: "vendor/registrasion"
merged: "c1e194a"
upstream:
origin: "git@gitlab.com:tchaypo/registrasion.git"
branch: "lca2018"
commit: "c1e194a"
git-subrepo:
version: "0.3.1"
origin: "???"
commit: "???"