I left a prefix on the names "Map" so that I would not have to re-arrange
each name too much, since I can't start identifiers with digits like "100thMM"

And remove RSC_EXTRAMAPUNIT, which doesn't seem to be doing anything anymore.

Change-Id: I5187824aa87e30caf5357b51b5384b5ab919d224
Reviewed-on: https://gerrit.libreoffice.org/29096Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>