This reverts commit ff0ea068de.
The next commit (Create a slug for old orders in the migration) will
change our strategy of writing code to handle the legacy slugless orders:
we will generate a slug for old orders.
Orders created before we introduced slugs don't have a slug. This commit
introduces code to work with them. Without these changes, the legacy
orders are not reachable any more, and trying to create a link for them,
crashes the page.
I wrote this commit because in my test environment I had a long-lived
order for testing purposes, and the home page crashed because the order
would show up in the list of Open Orders.
But for real, it's a real shitstorm in there.
- Added context by making the init go through a function
and not implicitly happen via imports
- Fixup all context and contextless function mixups
- splitup the models in sensible different files
- give the dump of view functions in views/__init__.py their own file
- add all routes via blueprints, not half of them
- move the slack notifications function and class to its own file,
no idea what it was doing in a views file in the first place.
