Since IDF's text search component does not allow further restrictions
on the result set, we make a second, filtered query to restrict to
the item state ('open' or 'closed') and optionally a label. All in
all this is all harder than it could be, especially the tag cloud
is very monolithic and should be replaced by a data-driven component
that is less dependent on a single data / query and link usage, but
this would for now require too many changes.
Similar questionable is the code duplication for the index, listStatus
and listLabel view implementations that all do more or less the same.
The search implementation now only uses one implementation for a very
similar use case. It also removes the artificial restriction to 100
results we had previously there and does not query a record for each
single result (as was done with Pluf_Search_ResultSet previously).
On my way through this I tried to generalize a couple of i18n texts
and removed smaller issues like the "trailing comma" in label lists.
This partially fixes issue 548.
