#323 Filter don't work properly

open
nobody
None
5
2005-09-27
2005-09-27
Anonymous
No

1. Filter are IMHO supposed to scan Headline and text,
but they scan the XML-sourcecode. Example: Set a
filter to highlite feed with "wiki", so you get all feeds
which are hosted on a wiki-website. not helpfull at all.
I believe that filter do not scan text and header, which
makes them useless at all.
2. Filter should be possible for folders too

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