cc @mattwr18 @tirokk@ulfgebhardt @appinteractive
The factories don't use string interpolation now but they use variables.
This resolves some errors of escaping strings when you send html along
with `post.content`. It is much cleaner, too.
* add notification in seeds
* extremely odd styling - on the index page the notification looks OK,
on the post page, the post card elements appear more densely packed
