Manual.rst: updated to the latest autocron features.

Autocron: implement a) 'output to a file' (content of the retrived page), b) search for a pattern on the output.
Manual.rst: updated to the latest autocron features.

fixed problem with buttons clipping trough alert

See merge request !46

Error messages as modals

See merge request !45

Change getMimeType() in Report in case file is missing or `file` beaks: instead to throw an exception, an empty string is returned.

Bug #5652 / TypeAheadSql: destroyed SQL statement. Fixed broken comparison and missing init of $sqlTest.

Session.php: After setting the QFQ cookie lifetime AND calling setcookie() after session_start(), the QFQ session remains. Also, skipping Session::clearAll() protects against broken SIP after logout!