AutoCorrect option "Add non-breaking space in French..." insert
non-breaking space (hard blank) and avoid recognition of percent
number and time number. This patch treats hard blanks as soft blank
in number format recognition

Rev.#1: change #define to const variable. Same change in svxaccor
Rev.#2: improvements

Change-Id: I30c2c36778cb53a0238a0829043dad4d709f97d2
Reviewed-on: https://gerrit.libreoffice.org/6015Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>