Group campaign pages #172
Description
Current behaviour
There are quite a few campaign related entries in the left navigation while each page is basically a stub.
This unnecessarily takes up a lot of space.
Expected Behaviour
Merge them into one page leaving only a single nav entry.
Note!
ff-product-teaser-campaign-processor is to be implemented as middleware and has its own section there. In the campaigns section maybe just briefly outline its purpose and link to the middleware page to avoid duplicated explanation.