Remove fallback to long description on sidebar and meta description #12119
This makes behaviour consistent. The long description is returned from API only. Sidebar, meta tags, and frontpage display short description or fallback to a string about Mastodon. That string used to be:
But I feel like that is very dry and too technical, so I am replacing it with the slogan we use in other places:
Small benefit: The "Learn more" button leading to the extended description page is now always displayed on the frontpage.