convert SW_MOVE constants to enum

Change-Id: I504862618bfeeeed674c1cb816104a167cb2e27e
Reviewed-on: https://gerrit.libreoffice.org/11935
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>