Core pr 5

Fixed default values in admin interface.
Fixed cache issue.
Fixed online URL.
Fixed data well 3 default reservation types.
I strongly disagree with accessing a specific `$_GET` value so deep in the call stack - especially when dealing with cache.

If the facets are important when retrieving a collection then they should be part of the method signature and passed from above levels - not retrieved when determining cache keys.

I appreciate the comment here.