and rename SfxUsrAnyItem class to SfxUnoAnyItem, the choice being made
by leaving the most popular one behind

Change-Id: If3818ee0966a50e3036d7e2db951910b6282c91f
Reviewed-on: https://gerrit.libreoffice.org/47313Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>