Bullet of non-monospace font that is used as non-printing character
to indicate space might be wider than the space. Drawing the bullet
over the space make the bullet too close to next character.
Shift the bullet accordingly so that bullet is centered with
original space.

Change-Id: I0d8d721041e8a475546fe25fb01bee374fc3e499
Reviewed-on: https://gerrit.libreoffice.org/20112Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mark Hung <marklh9@gmail.com>