Consolidate formatter functions, add a semitrusted function which keeps newlines make it available to the templates

Add weight to tags, reformat user interfaces to honor that situation and (re-)move additionally some tags who became obsolete now

This data is stored in the session and therefore kept among sessions or until the browser is closed for persons not logged in

Implement rudimentary sponsor metrics. This allows sponsors to publish their personal requirements and rules, maintainers can lookup to find out, whether a sponsor matches their package type. Besides, no automated correlation check is performed