and remove some useless casts.

setAnyProperty takes an Any for property value.
setProperty takes any value and creates an Any.

Change-Id: Ida0a80bd679775c08925309bfbc695630af2225f
Reviewed-on: https://gerrit.libreoffice.org/29917Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jochen Nitschke <j.nitschke+logerrit@ok.de>