It's only relevant for schema changes and downgrades and only
useful for deciding if a version is newer, which website users
rarely need to do.
Let's just hide it by default. It's still part of the package file name
if really needed.
The change in bb4b996726 broke the package details view since
it defaults the repo filter to mingw64, so clang64 links are broken now.
This now only applies the default for the list.
To avoid mixing things up in the future split up the endpoint logic.
Fixes#55
